99 results about "Swine herd" patented technology

The invention relates to the technical field of agricultural science, and discloses a low-purine ecological pig circulating breeding system which comprises a breeding environment regulation and control module, a low-purine feed management module, an excrement treatment module, a recycling module, a health monitoring module, an intelligent decision-making module, a traceability management module, a water quality purification module and an energy recovery module. The breeding environment regulation and control module monitors in real time and automatically regulates pig house environment parameters through a distributed sensor network; the low-purine feed management module generates a low-purine feed formula based on growth stage recognition and nutritional requirement analysis; the excrement treatment module is used for converting breeding wastes into organic fertilizer raw materials; the cyclic utilization module realizes precise returning of the organic fertilizer to the field according to planting requirements; the health monitoring module evaluates the purine level of the swinery; the intelligent decision-making module integrates the multi-source data to generate a comprehensive optimization scheme; and the traceability management module records whole-process data through a block chain technology. The stability of low-purine culture is guaranteed, and the success rate of low-purine culture is increased.

The invention relates to a primer of an RBP4 gene molecular marker related to pig weak litter number character and application of the primer, and belongs to the technical field of biology. The RBP4 gene molecular marker is located at the 105043789th base of chromosome 14 of a pig reference genome Sscrofa11.1 version, the base is mutated into A or G, and the genotypes are A / A, A / G and G / G. The number of weak piglets of the G / G genotype pigs is lower than that of the A / G and A / A genotype individuals, and the number of weak piglets of the A / G genotype pigs is lower than that of the A / A genotype individuals. According to the present invention, the forward and reverse primer pair is used to amplify the fragment containing the molecular marker site, and the amplification product is subjected to Sanger sequencing so as to rapidly and accurately identify the genotype of the individual; the molecular marker is used as a genetic marker for pig breeding to breed pigs with less weak piglets; the method can efficiently and accurately detect the weak piglet number character, improves the survival rate of healthy piglets of a pig herd, and has an important value for breeding and production of pigs.

The invention relates to the technical field of animal husbandry, and discloses an intelligent building pig farm feed control management method and system based on the Internet of Things, and the method comprises the steps: extracting pig herd behavior track data and pig herd state data in pig herd activity behavior data, and analyzing the pig herd activeness and pig herd abnormal behaviors corresponding to a building pig farm; analyzing the health state of the swinery in the building pig farm, analyzing the environment-ingestion correlation effect of the building pig farm, and analyzing the feed demand trend of the building pig farm; recording feed tower remaining data of the building pig farm, calculating a feed consumption rate corresponding to the building pig farm based on the feed tower remaining data, and setting a layered feeding rule of the building pig farm; and calculating the pig group fat dispersion of the building pig farm, determining the feed demand quota of the building pig farm, and executing feed control management on the building pig farm by using the Internet of Things management and control equipment to obtain a management result. The accuracy of intelligent building pig farm feed control management can be improved.

The invention belongs to the technical field of intelligent breeding and robots, and particularly relates to a pig house robot health monitoring and early warning system for a pig raising platform. The system aims to solve the problem of early warning lag caused by discontinuity of existing monitoring data. The system comprises a static sentinel node subsystem which is used for continuously collecting data at high frequency, generating an abnormal score and sending a triage request; the mobile diagnosis and service unit subsystem is used for performing autonomous diagnosis after receiving the request, acquiring individual accurate data and generating a report; and the central control and prediction subsystem is used for fusing data, constructing a space-time atlas model, predicting epidemic disease transmission and generating prospective early warning. By means of the system, 7 * 24-hour uninterrupted monitoring of swinery is achieved, data faults are solved, common screening-fine diagnosis cooperation is formed, a space-time diagram neural network is used for providing prospective early warning, and an epidemic disease prevention and control gateway is remarkably advanced.

The invention belongs to the technical field of immunological detection, and particularly relates to an antibody for resisting porcine pseudorabies virus glycoprotein gB and application of the antibody. The antibody is a first antibody or a second antibody, amino acid sequences of light chains CDR1-3 of the first antibody are respectively shown as SEQ ID NO.3-5, and amino acid sequences of heavy chains CDR1-3 of the first antibody are respectively shown as SEQ ID NO.8-10; the amino acid sequences of light chains CDR1-3 of the second antibody are respectively as shown in SEQ ID NO.13-15, and the amino acid sequences of heavy chains CDR1-3 of the second antibody are respectively as shown in SEQ ID NO.18-20. The antibody and the PRV glycoprotein gB have good reactivity, recognition specificity and binding sensitivity, the detection sensitivity and accuracy of the gB protein or the anti-gB protein antibody are improved, and an antibody tool with excellent performance is provided for qualitatively or quantitatively evaluating the immune effect of swine herd vaccines and detecting the content of porcine pseudorabies virus antigens in a sample.

The invention relates to the field of breeding management, and discloses an intelligent breeding environment data analysis method and system based on dynamic perception, and the method comprises the steps: dynamically collecting pig herd data through a mobile multi-mode perception terminal, and carrying out the data correction and segmentation through an anti-interference algorithm, so as to improve the accuracy; then, constructing a deep learning model, and fusing the physiological behaviors and the environmental data to generate a pig herd comprehensive comfort index; and finally, active regulation and control are realized through time sequence prediction, and instructions are issued to form a closed loop after the safety of the instructions is simulated and verified in the digital twin environment. The invention also provides a system for realizing the method. Through active prediction and simulation verification, the problems that in the prior art, sensing data are not accurate, a decision model is simple, regulation and control are lagged, and potential safety hazards exist are solved, the breeding environment can be accurately and safely optimized, and the intelligent level of breeding management is improved.

The invention is suitable for the technical field of molecular genetics, and provides an SNP molecular marker related to pig backfat thickness and application thereof. The invention studies and determines that the pig backfat thickness related molecular marker is located at the 95583333rd site (corresponding to the 701st basic group A / G mutation of SEQ ID NO: 1) of the No.18 chromosome of the international pig reference genome version 11.1, and verifies the influence effect of the molecular marker on the pig backfat thickness character. And when the basic group at the site is A, the pig has lower back fat thickness. On the basis, a molecular marker-assisted selection breeding technology for rapidly improving the backfat thickness character of the pig is established, the frequency can be increased generation by generation by optimizing the dominant allele (A), the backfat thickness of the breeding pig is remarkably reduced, the genetic improvement process of commercial pig herds containing landrace and large white pig blood lineage is accelerated, and the breeding efficiency is improved; the sales profit is increased for enterprises, the core competitiveness is improved, and the economic benefits of commercial pigs are improved.

The invention relates to the technical field of industrial big data and intelligent breeding, and particularly discloses a pig farm breeding management system and method based on industrial big data. The system comprises a multi-source heterogeneous data acquisition module, a data fusion and feature engineering module, a subclinical period anomaly detection module, a causal inference and root cause tracing module and a dynamic resource optimization scheduling module. High-order features are extracted through multi-source data fusion, a double-layer adaptive model is adopted to realize sub-clinical period anomaly detection, then root causes are deduced and positioned in combination with causality, and finally an accurate resource scheduling instruction is generated based on multi-objective optimization. According to the invention, extremely early warning and accurate intervention of the health state of the swinery can be realized, the disease outbreak risk is reduced, and the breeding benefit is improved.

The invention relates to a primer of a KLHL14 gene molecular marker related to pig weak litter number character and application of the primer, and belongs to the technical field of biology. The KLHL14 gene molecular marker is located at the 116519104 base of chromosome 6 of a pig reference genome Sscrofa11.1 version, the base is mutated into C or T, and the genotypes are C / C, C / T and T / T. According to the present invention, the forward and reverse primer pair is used to amplify the fragment containing the molecular marker site, and the amplification product is subjected to Sanger sequencing so as to rapidly and accurately identify the genotype of the individual; the molecular marker can be used as a genetic marker for pig breeding to breed pigs with less weak piglets; the method can efficiently and accurately detect the character of the number of the weak piglets of the pigs, improves the survival rate of healthy piglets of a swinery, and has an important value for breeding and production of the pigs.

This utility model relates to the field of door panel technology, specifically an infrared sensor-operated heat-insulating door for pigsties. Two second sliding grooves and positioning blocks are symmetrically arranged on the fixed plate. The positioning blocks are inserted into and slidably connected to the second sliding grooves. A second motor is provided at one end of the fixed plate, and a rotating shaft is provided at the output end of the second motor. Two second threaded rods with reverse thread structures are symmetrically arranged on the rotating shaft, and the two second threaded rods respectively pass through the two positioning blocks. By randomly detecting the piglets' body temperature through an infrared temperature sensor, piglets with abnormal body temperatures can be detected in a timely manner. Images captured by the camera provide farmers with more intuitive information to judge the health status of piglets, facilitating timely treatment measures, reducing the risk of piglet mortality due to disease, improving the overall health level of the pig herd, and ensuring farming efficiency.

The application provides a pig breeding and production integrated house group transfer planning and scheduling method and device, and relates to the technical field of intelligent breeding management. Through the fusion of health monitoring and reproductive performance double-dimensional data, the pigs are comprehensively rated and prioritized, so that the group transfer decision is no longer dependent on a single index or artificial experience, and high-value breeding pigs and pigs that need to be isolated can be accurately identified. In the process of combining pigs, the pig pathogen carrying state or health risk level is combined, and the same state priority merging principle is followed, so that the flow of different health state pigs is blocked, and biological safety control is strengthened. According to the loading scheme and the layout of the field, the target field is dynamically allocated and the transfer path is generated, the efficiency of the field is improved, and the stress of the pigs and the lag of the environmental control caused by the transfer confusion are reduced. Through scientific planning of the transfer process, the risk of disease outbreak and treatment cost are reduced, the smooth connection of each breeding link is ensured, and the survival rate of the pig group and the comprehensive breeding benefit are improved.

The present application relates to the field of molecular markers and animal genetic breeding technology, and particularly relates to a SNP marker affecting pig purine base content and application thereof. Based on three test pig populations of American purebred Landrace, American purebred Large White and American purebred Duroc, the present application uses pig whole genome resequencing and GWAS analysis to research and determine 15 SNP markers significantly affecting pig purine base content. By selecting the advantageous alleles of the above SNP markers, the frequency of the advantageous alleles can be increased generation by generation, the corresponding purine content can be reduced or increased, the progress of pig genetic improvement can be accelerated, and the economic benefits of pig breeding can be effectively improved.

The invention discloses a clostridium butyricum preparation for preventing and treating porcine reproductive and respiratory syndrome and application of the clostridium butyricum preparation, and belongs to the technical field of microbial fermentation feed. According to the invention, the clostridium butyricum with the preservation number of CCTCC NO: M 20231636 is subjected to activation culture, seed culture and high-density fermentation culture to prepare the clostridium butyricum preparation, and the effect of the clostridium butyricum preparation in prevention of PRRSV infection is developed. Experimental results show that when the clostridium butyricum preparation is added into a pig complete feed, the positive infection rate of the porcine reproductive and respiratory syndrome of a pig herd can be effectively reduced, the death number of the pig herd is remarkably reduced, and the clostridium butyricum preparation has outstanding prevention and treatment effects. The clostridium butyricum preparation provided by the invention is free from drug resistance and toxic and side effect risks, has the advantages of low cost, high safety, environment friendliness and the like, and has great significance in benefit improvement of the live pig breeding industry.

The present application relates to a method for identifying a sex antagonistic hotspot region on a pig autosomal chromosome and application thereof. The method provided by the present application comprises the following specific steps: constructing a hybrid population F0, F1, F2 three generations, genome sequencing and SNP identification, transmission tracking of genetic material in the hybrid population pedigree, and identifying a sex antagonistic hotspot region. The method of the present application identifies that the Chr3:121M window is a sex ratio directional regulation molecular marker that is beneficial to the generation of male offspring in the Large White / Mini pig genotype individual. According to the method of the present application, the pig population sex can be predicted and regulated, and by screening and optimal mating of the genotype of the parent before mating, a plurality of generations is obtained by continuous cross without introducing exogenous blood relationship, so that the maximum value of the proportion of the genotype beneficial to the male or female is achieved under the condition that all genotypes of each generation are retained at the population level, and then the dynamic regulation of the sex ratio of the offspring pig population is achieved.

The invention belongs to the technical field of reuse water utilization of farms, and particularly discloses a reuse water utilization system and method for spraying of a breeding house, and the system comprises a water regeneration device which is connected with a first water storage tank through a regeneration water outlet pipe; the first water storage tank is used for temporarily storing reclaimed water, a submersible filter and a throw-in type liquid level meter are arranged in the first water storage tank, the first water storage tank is connected with the water purification tank through a filtered water outlet pipe, and the filtered water outlet pipe is further connected with a first dosing device; a first water quality detection device is arranged in the water purification tank, and water in the water purification tank is connected with the second water storage tank through a purified water outlet pipe; and the second water storage pond is connected with a second dosing device, a second water quality detection device is arranged in the second water storage pond, and the second water storage pond is externally connected with the breeding house spraying pipeline through a clear water outlet pipe. Normal operation of the spraying equipment can be guaranteed, no odor exists, reuse water is safe to use, and the health and the death rate of pig herds cannot be affected.

The application provides a method and system for realizing closed-loop management of pig raising by using an online operation analysis system, comprising: setting production mode parameters and pig flow operation mode; determining data sources according to the production mode parameters and the pig flow operation mode; performing forward calculation when the data sources are existing inventory; performing rolling prediction of mating when the data sources are future plans; generating future daily pig population structure according to the forward calculation and the rolling prediction of mating; calculating predicted total cost and estimated cost per head of each month in the future according to calculated feed cost, fixed cost allocation cost and variable cost; calculating predicted total profit according to the estimated cost per head and predicted output; comparing the predicted total profit with the actual total profit; realizing high-precision future deduction based on the current inventory and the production parameters; establishing a dynamic linkage mechanism of production indicators and cost and profit; realizing digital closed loop from target setting, process early warning to operation review.

The invention relates to the technical field of molecular markers and animal genetic breeding, in particular to an SNP (Single Nucleotide Polymorphism) marker capable of influencing the content of IMP or GMP (Good Manufacturing Practice) of pigs and application of the SNP marker. According to the invention, based on three test swinery of American-series purebred landrace, American-series purebred large white pig and American-series purebred Duroc, pig whole genome re-sequencing and GWAS analysis are adopted, 15 SNP markers related to the content of IMP or GMP are researched and determined, and by optimizing the dominant alleles of the SNP, the frequency of the dominant alleles can be increased generation by generation, the content of IMP or GMP can be increased, and the number of SNP markers related to the content of IMP or GMP can be increased. The pig genetic improvement progress is accelerated, so that the economic benefit of breeding pig breeding is effectively improved.

The invention belongs to the field of biology, and discloses a PDCoV recombinant RBD protein and an IgA Elisa kit thereof, and the amino acid sequence of the recombinant RBD protein is as shown in SEQ ID NO. 1. The recombinant RBD protein is used for an indirect ELISA kit, can cover IgA response in the early stage of infection, can accurately recognize a PDCoV specific IgA antibody in a breast milk sample, and cannot cause false positive due to infection of other common pathogens in a pig herd; the indirect ELISA kit is good in stability (the intra-batch variation coefficient is 1.848%-6.062%, and the inter-batch variation coefficient is 4.504%-7.790%), the coincidence rate of the indirect ELISA kit and an immunofluorescence experiment reaches 93.26%, the repeatability and the coincidence rate are high, and the indirect ELISA kit has the advantages of simplicity and convenience in operation, short time consumption and large detection flux of an ELISA method, and is suitable for large-scale screening of clinical pig milk samples.

This invention belongs to the field of animal feed technology and discloses the application of glucuronolactone in the preparation of feed that alleviates spleen damage caused by the combined effects of PRRSV and DON. This invention discovers that glucuronolactone can effectively alleviate spleen damage in piglets caused by co-exposure to PRRSV and DON. It exerts its protective effect by activating the Nrf2 antioxidant signaling pathway, improving spleen tissue structure, alleviating oxidative stress, inhibiting inflammatory responses, and inhibiting apoptosis. This invention also provides a feed containing the aforementioned effective amount of glucuronolactone, with the basic feed tailored to the nutritional needs of piglets. This invention fills the technological gap in effective intervention methods for spleen damage under PRRSV and DON co-exposure. The glucuronolactone addition process is simple, the effect is significant, and it is suitable for large-scale feed production. It can effectively solve the problem of immunosuppression in pig herds caused by the combined harm of PRRSV and DON in the pig industry, and has important practical value.

A method and system for counting pigs in a hog house are provided. The system includes a computing device and an imaging device. The computing device has a processor and a storage device having computer executable code stored therein. The computer executable code is configured to: receive images captured from one end of the house to the other end of the house; detect key points in the images using a neural network; identify pig skeletons by associating a plurality of related key points; track the skeletons in the images to obtain trajectories; divide each image into active zones and deactive zones; assign a spatial value of 0 to the skeletons in the active zones and a spatial value of 1 to the skeletons in the deactive zones; sum a first order difference of the spatial values for each trajectory to obtain a trajectory count; and add the trajectory counts to obtain a pig count.

This utility model discloses a quantitative structure for a feeding device, relating to the technical field of quantitative structures for feeding devices. It includes a feeding hopper, a support frame, a feeding tray, a feeding box, a pusher plate, a quantitative trough, a discharge pipe, a control handle, and a positioning shell. The surface of the feeding hopper is fixedly connected to the surface of the support frame, the bottom of the support frame is fixedly connected to the surface of the feeding tray, the top of the feeding box is fixedly connected to the bottom of the feeding hopper, the top of the discharge pipe is fixedly connected to the bottom of the feeding box, and the pusher plate is movably connected to the inner cavity of the feeding box. This utility model, by setting a positioning device and a moving plate device, solves the problem that the quantitative function of pig feeding devices is a key design element for ensuring efficiency and effectiveness in modern pig farming. Its core function is to achieve scientific feeding by precisely controlling the amount of feed delivered. If the feeding device cannot quantitatively dispense feed, it can easily lead to serious feed waste, soaring farming costs, and uneven growth in the pig herd.

The invention discloses a porcine reproductive and respiratory syndrome virus typing quadruple fluorescent quantitative RT-PCR (reverse transcription-polymerase chain reaction) detection composition and a kit thereof. The detection composition is used for simultaneously detecting four viruses, namely PRRSV-2 (porcine reproductive and respiratory syndrome virus 2), NADC30-like PRRSV (porcine reproductive and respiratory syndrome virus), HP-PRRSV (porcine reproductive and respiratory syndrome virus) and NADC34-like PRRSV; the kit obtained on the basis of the detection composition has good sensitivity, specificity and repeatability, nucleic acids of PRRSV-2, NADC30-like, HP-PRRSV and NADC34-like PRRSV strains can be effectively distinguished, the virus types can be accurately and rapidly identified by analyzing fluorescent quantitative results, the detection period is greatly shortened, and the kit has the advantages of being easy to operate, high in sensitivity, rapid in detection and the like, and has a good application prospect in the detection of PRRSV-2, NADC30-like, HP-PRRSV and NADC34-like PRRSV strains. And a new tool is provided for monitoring the propagation of the PRRSV in the swinery.

This invention relates to the fields of molecular markers and animal genetic breeding technology, and particularly to a SNP marker affecting the total flavor nucleotide content in pigs and its application. Based on three experimental pig populations—purebred American Landrace, purebred American Large White, and purebred American Duroc—this invention employs whole-genome resequencing and GWAS analysis to study and identify nine SNP markers associated with total flavor nucleotides. By optimizing the dominant alleles of these SNPs, the frequency of dominant alleles can be increased generation by generation, thereby increasing the total flavor nucleotide content, improving pork quality, accelerating the progress of pig genetic improvement, and effectively improving the economic benefits of pig breeding.

The invention discloses a porcine pseudorabies GE purification scheme, and the purification method comprises the following steps: S1, pig farm environment background evaluation and odor purification device installation; s2, evaluating the health status of the swinery and optimizing an immune program; s3, epidemic disease purification and odor cooperative control; s4, environment-epidemic disease linkage monitoring and early warning are carried out; and S5, maintaining the purification effect. The environment stress is reduced through the odor purification device, the immunity of pigs is enhanced, and the propagation opportunity of PRV is reduced; biodegradation and photocatalysis technologies are combined, so that a remarkable inactivation effect on PRV aerosol is achieved; establishing a first machine learning-based environment parameter and PRV propagation risk prediction model to realize early warning; the use amount of disinfectants is reduced by 40%, the use amount of antibiotics is reduced, and green breeding is achieved; the PRV purification period can be shortened, the maintenance cost is reduced, and meanwhile, the working environment of a pig farm is remarkably improved.

The present application relates to the technical field of animal husbandry, and discloses an intelligent building pig farm feed control management method and system based on the Internet of Things, which comprises the following steps: extracting pig group behavior trajectory data and pig group body posture data from pig group activity behavior data, respectively analyzing the pig group activity and abnormal behavior of the corresponding pig group in the building pig farm; analyzing the health status of the pig group in the building pig farm, the environment-foraging correlation effect of the building pig farm, and the feed demand trend of the building pig farm; recording the remaining amount data of the building pig farm, calculating the corresponding feed consumption rate of the building pig farm based on the remaining amount data, setting the hierarchical feeding rules of the building pig farm; calculating the pig group body fat dispersion of the building pig farm, determining the feed demand quota of the building pig farm, and using the Internet of Things control equipment to perform feed control management on the building pig farm to obtain the management result. The present application can improve the accuracy of intelligent building pig farm feed control management.

The utility model belongs to the field of closed breeding houses, and particularly relates to a non-contact feeding device in a closed breeding house, which comprises a feed box, an electromagnetic valve fixedly connected to the bottom of the feed box, a first pipeline fixedly connected to the bottom of the electromagnetic valve, a concave block fixedly connected to the surface of the feed box, and a cover plate movably hinged to one side of the concave block through a hinge. Water is sprayed to an inner cavity of the inner shell through a third pipeline to wash feed on the inner wall of the inner shell, the inner shell can rotate so that all-directional cleaning can be carried out, the inner shell can be scraped by a scraping plate when rotating, the feed cleaning effect is better, and the feed cleaning efficiency is improved. The effects that cleaned feed can be discharged together with water, waste of pig feed can be reduced, the pig feed can be used for drinking water of pig herds are achieved, and the problems that part of feed is prone to adhering to a feed box and cannot be discharged thoroughly, and feed waste is prone to being caused are solved.

The present invention provides a variant pseudorabies virus (PRV) gC-gD epitope concatemer and its application. The amino acid sequence of the variant pseudorabies virus gC-gD expression concatemer is shown in SEQ ID NO.1, and the nucleotide sequence of its encoding gene is shown in SEQ ID NO.2. The present invention uses the variant pseudorabies virus gC-gD epitope concatemer to establish an indirect ELISA detection method for PRV neutralizing antibodies with strong specificity, high sensitivity and good repeatability. The method can fully meet the serological diagnosis requirements of pig herds in pig farms where PRV wild virus is prevalent and pig farms where PRV wild virus has been purified, laying a certain foundation for the development of a new PRV polypeptide vaccine.

The invention discloses application of an ALPK2 gene missense mutation marker in breeding of pigs with dominant production traits, and belongs to the technical field of molecular genetics and livestock breeding. By detecting ALPK2 gene mutation and screening individuals carrying mutation rs327271406 as a GG genotype, individuals with excellent growth traits (fast growth and high meat production performance) of European pig breeds can be rapidly screened out, the breeding period is shortened, the meat production efficiency of pig herds is improved, the breeding cost is reduced, the method is used for early screening of pig breeds with fast growth and high meat yield, high-quality pig herd breeding is accelerated, and the economic benefit is increased. The method evaluates the pig muscle development potential, guides molecular marker assisted breeding, and is especially used for commercialized lean type pig production.

The application belongs to the field of biology, discloses PDCoV recombinant RBD protein and IgA ELISA kit thereof, and the amino acid sequence of the recombinant RBD protein is shown as SEQ ID NO.1.The recombinant RBD protein is used for indirect ELISA kit, can cover early IgA response of infection, can accurately recognize PDCoV specific IgA antibody in breast milk sample, and will not cause false positive due to infection of other common pathogens in a pig herd; the indirect ELISA kit of the application is stable (the batch variation coefficient is 1.848%~6.062%, and the batch variation coefficient is 4.504%~7.790%), and the coincidence rate with an immunofluorescence experiment reaches 93.26%, the repeatability and the coincidence rate are high, the method has the advantages of simple operation, short time consumption and large detection flux, and is suitable for large-scale screening of clinical pig milk samples.

The utility model discloses a needleless injection device with adjustable injection pressure, and relates to the technical field of livestock breeding equipment, in particular to the needleless injection device with the adjustable injection pressure, the needleless injection device with the adjustable injection pressure comprises an injection assembly and a needle assembly, the injection assembly comprises an injection cavity main body and a push rod piston, an injection cavity is formed in the injection cavity main body, and the push rod piston is installed in the injection cavity in a sealed and sliding mode; the driving assembly comprises a push rod and a power spring, the push rod is fixedly connected with the push rod piston, and the power spring is connected with the push rod and used for driving the push rod to act in the release process after compression; the pressure regulating assembly is connected with the power spring; according to the needle-free injection device with the adjustable injection pressure, the pressure adjusting assembly is additionally arranged, the initial compression amount of the power spring in the driving assembly is changed, then the maximum elastic force of the power spring during force storage is changed, the injection pressure during injection is changed, and therefore the injection pressure can be adjusted so as to adapt to injection of swinery of different day ages.