726 results about "Corn kernel" patented technology

The invention relates to the technical field of corn kernel quality detection, in particular to a corn kernel quality detection model construction method and system based on multi-source data fusion, and the method comprises the following steps: S1, multi-source data collection: collecting apparent morphology data of corn kernels through a multi-spectral imaging device, synchronously utilizing a near-infrared spectrometer to obtain spectral data of internal components of the corn kernels, and measuring structural density characteristic data of the corn kernels in combination with a sonic sensor; s2, multi-modal feature construction: forming a multi-modal feature matrix; s3, dynamic weighted fusion: generating a mixed feature vector; s4, constructing a dual-channel neural network: constructing a dual-channel deep neural network based on the generated mixed feature vector; and S5, model compression and deployment optimization: generating a lightweight detection model suitable for the embedded device. According to the invention, multiple requirements of an agricultural field on real-time performance, precision and deployment flexibility are met.

The invention provides a method for carrying out corn quality seed selection by using a hyperspectral imaging technology, and belongs to the technical field of corn quality seed selection. Corn kernels are subjected to spectrum scanning in a wavelength range of 400nm to 2500nm, spectrum data are preprocessed through a continuous wavelet transform algorithm, baseline drift and noise interference are removed, and a high-quality seed selection result is obtained. And accurately extracting spectral characteristic peaks of protein, starch, grease and moisture. And establishing a characteristic peak distribution matrix to record peak intensity distribution, and calculating a characteristic peak intensity weight coefficient and a position offset. And constructing a characteristic peak quality incidence matrix, establishing a numerical mapping relationship between the spectral characteristics and the quality parameters, and obtaining a peak width parameter and a spectral noise level. The spectral quality fusion function is adopted to process the multi-dimensional characteristic parameters, and the comprehensive quality evaluation index and the single quality evaluation index are calculated, so that the technical problem that the multi-dimensional quality characteristics of the corn kernels cannot be accurately identified and accurately graded is solved.

The invention discloses a whole corn plant harvesting, separating and packing machine, which belongs to the field of agricultural machinery and comprises a frame assembly, a corn header is arranged at the front end of the frame assembly, and a corn ear peeling device, a corn cob collecting device, a corn cob transferring device and a corn cob threshing device are arranged on the rear side of the corn header. A corn kernel storage chamber is arranged on the left side of the corn cob threshing device, and a corn cob transfer device and a corn cob storage chamber are arranged on the rear side of the corn cob threshing device; a straw smashing and screening device is arranged below the corncob peeling device, and a soft material conveying track, a hard skin conveying track, a soft material packaging machine, a film winding device, a fermentation liquor spraying device and a hard skin squeezing and bundling machine are arranged on the rear side of the straw smashing and screening device. Whole corn plants are harvested through one machine, and after being harvested, the whole corn plants are separated according to material attributes and are not wasted any more, so that the whole corn plants are fully utilized; people are intellectual; the effort is made to the best; the whole corn plants are completely eaten and squeezed on one machine.

The invention relates to the technical field of infrared spectroscopic analysis, in particular to a spectroscopic analysis-based corn kernel nutrient abundance and deficiency state evaluation method, which comprises the following steps of: irradiating corn kernels by using near-infrared and mid-infrared light sources, collecting reflected spectral signals, and recording spectral signal data; and based on the spectral signal data, extracting key wavelength region data to obtain key spectral data. According to the invention, the near-infrared light source and the mid-infrared light source are combined, so that the capability of acquiring nutrient information of the corn kernels is enhanced, the reflection characteristic of spectral signals is utilized, the interference of environmental factors on data acquisition is reduced, and the stability of spectral data is improved. The screening of key wavelength regions reduces irrelevant information, so that the spectral data is more concentrated on the characteristic wave bands influencing the nutrient state. The spectral signals are processed through wavelet transform, the resolution ratio of the characteristic peak value is improved, the local change trend of the spectral signals is enhanced, and characteristic extraction is more accurate.

System for and method of producing a pure starch slurry and alcohol by using combined corn wet and dry milling processes. A simple and lower cost process to obtain starch inside floury endosperm is provided. The starch can be highly purified to meet green technology process needs. The remaining starch inside the corn kernels can be used as feedstock for alcohol production and to produce valuable co-products such as oil and various animal feeds.

System for and method of producing a pure starch slurry and alcohol by using combined corn wet and dry milling processes. A simple and lower cost process to obtain starch inside floury endosperm is provided. The starch can be highly purified to meet green technology process needs. The remaining starch inside the corn kernels can be used as feedstock for alcohol production and to produce valuable co-products such as oil and various animal feeds.

The invention relates to the technical field of molecular markers, in particular to a biomarker related to the zeaxanthin content character of sweet corn kernels and application of the biomarker. The RIL population is used for performing QTL positioning on the corn kernel zeaxanthin content character, it is found that a major QTL related to the sweet corn kernel zeaxanthin content exists on the sixth chromosome of corn, the major QTL is located between SNP sites Schr6: 83027949 and Schr6: 84835891, the phenotype contribution rate of the corn kernel zeaxanthin content is 18.69%, and the major QTL is a major QTL related to the sweet corn kernel zeaxanthin content. The major QTL can be used for screening or auxiliary screening of sweet corn with relatively high zeaxanthin content, when the genotype of Schr6: 83027949 is GG and the genotype of Schr6: 84835891 is AA, the zeaxanthin content is relatively high, technical support is provided for molecular marker-assisted breeding, and the major QTL has important significance in improving the nutritional quality of the sweet corn.

The invention relates to a zeaxanthin adenine dinucleotide synthetase gene ZmFADS1 and an encoded protein and application thereof, and belongs to the technical field of plant genetic engineering, the ZmFADS1 gene has a nucleotide sequence shown as SEQ ID NO.1, zeaxanthin adenine dinucleotide synthetase encoded by the gene has an amino acid sequence shown as SEQ ID NO.2, and the zeaxanthin adenine dinucleotide synthetase has a nucleotide sequence shown as SEQ ID NO.1. The zeaxanthin adenine dinucleotide synthetase has a nucleotide sequence shown as SEQ ID NO.2. The overexpression of the gene in plants can improve the quality of corn kernels. The ZmFADS1 gene is cloned from corn for the first time, and the mechanism that the ZmFADS1 can improve the FAD synthesis capacity of plant leaves through overexpression in the corn and further improve the enrichment capacity of the leaves on heavy metal arsenic so as to reduce the arsenic content in corn kernels is found, so that a theoretical basis is provided for cultivating corn varieties with low-arsenic-content kernels.

A corn kernel harvesting device and method thereof is provided. As the corn kernel harvesting device, or corn shucker, moves from a first configuration to a second configuration, the device separates corn kernels from its respective inner core, such as a corn cob. The corn kernel harvesting device comprises an ejection assembly, harvesting assembly, discharge assembly, and is configured to enable a user to remove corn kernels efficiently and consistently from a corn cob.

The invention relates to the technical field of molecular inheritance and genetic engineering, in particular to a gene ZmGDR1 for regulating and controlling the dehydration rate and the flowering phase of corn kernels and application of the gene ZmGDR1, and the gene ZmGDR1 has a polynucleotide sequence as shown in SEQ ID NO: 1 or an amino acid sequence as shown in SEQ ID NO: 4. The ZmGDR1 provided by the invention can effectively regulate and control the water content and the dehydration rate of corn kernels, and meanwhile, the flowering period of corn is advanced, so that a new gene resource is provided for cultivating a new variety of early-maturing and rapid-dehydration corn.

The invention discloses ZmPHYB1 and ZmPHYB2 gene mutants and application of the ZmPHYB1 and ZmPHYB2 gene mutants in corn seeds, and belongs to the field of plant biotechnology breeding. According to the corn ZmPHYB1 and / or ZmPHYB2 gene provided by the invention, after a plant generates function loss mutation of an endogenous gene or the expression of the ZmPHYB1 and / or ZmPHYB2 gene is inhibited, phenotypes with smaller grains, reduced grain weight, shortened corn grain filling time, reduced grain water content and / or improved dehydration rate can be obtained; the gene resource and the application method thereof have a wide application prospect in the field of corn breeding.

The invention provides a fresh corn header, which belongs to the technical field of corn harvesting and comprises a plurality of groups of harvesting chain wheels, each group of harvesting chain wheels are connected through a harvesting chain, the outer side of each harvesting chain is connected with a plurality of pushing blocks, and a material channel is formed between every two adjacent harvesting chains; the bottom of the harvesting chain wheel on one side is fixed to a bottom plate, and the bottom plate is fixed to the table body. An elastic ear picking device is further arranged on the bottom plate and arranged on the inner side of the harvesting chain, and a harvesting chain wheel on the other side of the elastic ear picking device is fixed to the table body. The table body is also connected with a stalk pulling assembly for pulling corn stalks; the stem pulling assembly is located at the bottom of the elastic ear picking device. According to the corn harvester, the elastic ear picking device moves along with corn when the stalk pulling assembly separates corn stalks from the corn, stress of corn kernels is reduced, meanwhile, the elastic ear picking device can change the size of a material channel according to the size of the corn, rolling of the corn is reduced, and therefore damage to the corn is reduced.

The invention discloses a corn ZmMYBR37 gene and an application of the corn ZmMYBR37 gene in regulating and controlling the size of corn kernels. The nucleotide sequence of the ZmMYBR37 gene is as shown in SEQ ID No: 1 in a sequence table. A mutant material with small grains and reduced hundred-grain weight is separated from a corn EMS mutant library, and a mutation site occurs on a function unknown gene ZmMYBR37, so that protein translation is terminated in advance. The information analysis finds that the gene coding protein has a conservative MYB structural domain, and the gene coding protein is speculated to belong to an MYB transcription factor family. Gene expression analysis finds that the gene is high in constitutive expression in corn and high in expression level in leaves and embryos. The corn material overexpressed with the ZmMYBR37 has the advantages that the grain size is increased, and the hundred-grain weight is obviously increased, so that the ZmMYBR37 has the potential of increasing the corn yield.

The invention relates to the technical field of household flour mills, in particular to an environment-friendly and dust-suppression flour milling device for corn flour processing, which comprises a motor shell and a crushing cup arranged on the motor shell, a square rotating shaft is arranged on the motor shell, a guide plate is arranged in the crushing cup, a flour milling assembly is movably arranged in the crushing cup, and the motor shell is provided with a motor. The corn grinding device has the function of grinding fed corn for multiple times, meanwhile, feeding can be adjusted to a certain degree in the whole grinding process, the corn can continuously enter a whole grinding area to be ground, and through cooperation between an arranged crushing arc plate and an annular grinding disc, when the whole corn is ground, the grinding efficiency of the corn is improved, and the corn grinding efficiency is improved. According to the intelligent corn machine disclosed by the invention, the corn kernels are subjected to primary crushing operation, and the treated corn kernels are put into the grinding area between the first grinding disc and the second grinding disc to be ground, so that the whole grinding speed can be increased, and meanwhile, the energy consumption of the whole intelligent corn machine during use can be reduced.

The invention belongs to the technical field of extraction and purification of plant components, and relates to a low-temperature freezing vacuum drying nano processing method for extracting anthocyanin from purple corn, in particular to a method for extracting anthocyanin from corn kernels, cores, straws, roots and stigmas of purple corn. The processing method comprises the steps of pretreatment, concentration, hydroxyl radical treatment, quick freezing, nano crushing and the like. A hydroxyl radical treatment method is adopted, so that harmful substances such as pesticide residues can be efficiently, quickly and thoroughly removed; the effect of extracting the anthocyanin from corn kernels, roots, cores, stems and stigma of purple corn by adopting a low-temperature freezing vacuum drying technology is remarkable, the purification rate is high, and the anthocyanin containing 99% of biological activity is achieved. The nanoscale anthocyanin is processed by adopting jet mill equipment and can be conveniently absorbed by a human body and widely applied to various fields.

The utility model relates to the field of fresh sweet-waxy corn processing, in particular to a cleaning device for fresh sweet-waxy corn processing. The cleaning device for processing the fresh sweet waxy corn comprises a protective shell, a supporting frame, a feeding frame, a transmission machine I, a transmission machine II, a water outlet pipe I and a high-pressure spray head I. The supporting frame is fixedly connected to the lower portion of the protective shell, and the feeding frame is installed on the right side of the upper portion of the protective shell. A water outlet pipe I is connected to the right side of the upper portion in the protective shell, and a plurality of high-pressure spray heads I are connected to the upper portion of the water outlet pipe I. By arranging the cleaning brushes, the motor and the synchronous belt, the motor operates to drive the synchronous belt to rotate, and the synchronous belt drives the multiple cleaning brushes to rotate and brush into gaps among corn kernels to brush away soil in the gaps, so that the effect of cleaning the gaps is achieved, and the problem that soil is left in the gaps among the corn kernels is effectively solved.

The utility model relates to the technical field of bioactive peptide extraction devices, and discloses a bioactive peptide extraction device which comprises a treatment box, a stock bin and a filter partition plate, and a crushing motor is mounted on one side of the treatment box; when a plurality of groups of crushing blades are driven by a connecting shaft at the output end of a crushing motor to crush corn kernels introduced from a top bin of a treatment box, the end part of the connecting shaft drives a driven gear ring through a driving gear, so that the driven gear ring is connected with a turntable on a rotating shaft and a stirring plate on the circumference to synchronously rotate; in this way, after falling on the filtering partition plate, crushed corn which is not crushed to be qualified can be stirred by the stirring plate on the side face of the rotating disc, fall off from the upper portion of the crushing blades again and fall off through the filtering partition plate after being repeatedly crushed with the crushing blades, and therefore full crushing of the corn kernel bioactive peptide extract is achieved. And a brush on one side of the shifting plate can cut through blockages in the filtering holes in the surface of the filtering partition plate, so that the filtering holes are cleaned.

The invention belongs to the field of molecular biology, and discloses acquisition of corn kernel protein major QTL qHP5 and development and application of molecular marker primers of the corn kernel protein major QTL qHP5. The major QTL qHP5 for controlling the corn kernel protein is located at the fifth chromosome of the corn, the major QTL locus for controlling the variation of the corn kernel protein is an excellent haplotype SNP marker which is closely linked with the major QTL locus and is located at the 166392631th basic group of the fifth chromosome of a corn B73 reference genome, the explained phenotype contribution rate of the corn kernel protein is 9.8%, and the explained phenotype contribution rate of the corn kernel protein is 9.8%. The PARMS marker designed by using the SNP is used for detecting a corn inbred line group, is simple and convenient to operate and clear in typing, has a good selection effect on yield traits and growth period traits such as corn ear weight, hundred-grain weight, single-ear grain weight, row number of ears, row number of grains and the like, and can be used for molecular marker-assisted selection breeding of the corn kernel protein content.

The utility model relates to the technical field of corn processing, in particular to a corn drying device which comprises a drying barrel, a stirring shaft, a stirring plate and a lining layer, during application, the screen plate is detached, corn kernels to be dried are injected into a drying cavity from a material injection port and then the screen plate is installed, and the stirring shaft drives the stirring plate to rotate together when rotating, so that the corn kernels are dried. And therefore, the corn kernels in the drying cavity are stirred. A heat source in the lining layer plays a role in heating and drying, the drying efficiency can be improved through stirring of the stirring plates, the mesh plate is of a mesh structure, water vapor is discharged through the mesh plate of the material injection opening, and the corn kernels are dried. And through the mesh structures arranged on the plate bodies of the stirring plates, a large number of corn kernels can pass through meshes, stirring of the two symmetrically-arranged stirring plates on the corn kernels is more random, and the drying efficiency is further improved. In conclusion, corn can be automatically dried, and the drying efficiency is excellent.

The invention discloses a fertilizing method for realizing simultaneous enrichment of iron, zinc and selenium in corn kernels. Relates to the technical field of corn nutrient fertilization. Comprising the following steps: 1) applying a zinc fertilizer and an iron fertilizer; humic acid; organic fertilizer or farmyard manure; a calcium-magnesium-sulfur-silicon fertilizer; spraying fertilizer on leaf surfaces by an unmanned aerial vehicle. According to the method, through reasonable fertilization, namely reasonable matching of large, medium and trace elements (carbon, nitrogen, phosphorus, iron, zinc, selenium and the like), the yield of corn kernels and the simultaneous improvement of iron, zinc and selenium in the kernels are achieved in calcareous calcareous alkaline soil, saline-alkali soil and light soil, and the contradiction between high yield and nutrient quality of the trace elements is solved.

The invention relates to the technical field of corn test, in particular to a pustulation stage corn kernel moisture in-situ detection system and device, the pustulation stage corn kernel moisture in-situ detection device is utilized, the height, angle and the like of a spectrum detector are adjusted according to actual conditions to determine the position of a corncob tip, and near infrared spectrum data of the corncob tip are collected through the spectrum detector; the method comprises the following steps: carrying out water content determination on corn kernels in a pustulation period, establishing a detection model and evaluating the detection model through construction of a general model based on combination of a direct correction algorithm, a genetic algorithm and a secondary wavelength screening method for iteratively retaining information variables, and finally completing rapid detection of the water content of the corn kernels in the pustulation period by using the detection model. According to the system and the device, the problem of wavelength redundancy in the whole spectrum of the near infrared spectrum is solved, the characteristic wavelength points can be screened out from the whole spectrum to form the characteristic subset, the problems of long time consumption and high working intensity of the technology for detecting the moisture content in the corn breeding process are solved, the efficiency and the productivity in a laboratory and a production environment are improved, and the labor intensity is reduced. The rapid detection of the grain moisture in the corn filling period can be realized.

The invention discloses an InDel marker linked with characters of high-quality sweet-waxy corn kernels and application of the InDel marker, self-bred high-quality sweet-waxy corn kernels are selected to be hybridized with a conventional waxy corn inbred line, and molecular markers (primer pair sequences are as shown in SEQ ID No.1 and SEQ ID No.2) closely linked with target characters are utilized to perform rapid offspring screening, so that the breeding efficiency is remarkably improved. According to the method, the breeding period can be shortened, the breeding cost can be reduced, genetic resources of the sweet-waxy fused corn can be effectively widened, and technical support is provided for cultivation of novel sweet-waxy corn varieties.

The invention discloses a method for simultaneously extracting starch and protein and application thereof. The invention belongs to the technical field of corn deep processing. The invention aims to solve the technical problems that the existing method is low in production efficiency and the obtained corn starch and corn protein are poor in processing characteristic and digestion characteristic. The method comprises the following steps: (1) performing vacuum low-temperature alkalization cooking on corn kernels in a calcium hydroxide solution; (2) performing ultrasonic-high static pressure cooperative treatment after cooking, and then soaking; (3) performing coarse grinding on the soaked corn kernels, then performing fine grinding, and performing enzymolysis with compound protease; and (4) finely grinding, filtering, standing, centrifuging, washing with water, precipitating, respectively collecting a lower-layer white part and an upper-layer yellow part, and freeze-drying to respectively obtain the corn starch and the corn protein. The method improves the processing characteristics of starch and the digestion characteristics of protein, and can be applied to development and production of high-quality corn starch or corn protein-based food.

The utility model provides a corn threshing device, which relates to the technical field of corn threshing devices and comprises a device body and a threshing mechanism, a dredging mechanism is mounted at the bottom of the threshing mechanism, the threshing mechanism comprises a mounting frame, a threshing box is fixedly connected to the surface of the mounting frame, and corn kernel discharge holes are formed in the bottom of the threshing box. According to the device, a third belt wheel is driven by rotation of a first transmission shaft to rotate, similarly, a second connecting belt and a fourth belt wheel are made to rotate under the rotation effect of the third belt wheel, and at the moment, the fourth belt wheel drives a second transmission shaft and a cam to rotate; under the pushing action of a cam, a limiting head and a connecting plate reciprocate up and down, the connecting plate reciprocates up and down to drive a push plate and a dredging rod to move up and down, a corn kernel discharging hole in the bottom of the threshing box is pulled and inserted back and forth through the dredging rod, and the corn kernel discharging hole is prevented from being blocked.

The invention discloses a corn protein enzymolysis fermentation device and a fermentation method, a side plate is arranged on one side of the top of a premixing tank, a blocking mechanism is arranged on the side plate, and an input port of the blocking mechanism is communicated with a medicament box. A required medicament is placed in the medicament box in advance, corn is put into the rotary drum after the equipment is started, the corn can move to the positions of the grinding disc and the top disc along the rotary drum, and corn kernels can be ground and crushed through cooperation of the top disc and the grinding disc in the process that the servo motor drives the rotary drum to rotate. After crushing, the crushed corn kernels are washed by a solution to be away from the grinding disc, the crushed corn kernels cannot be accumulated on the grinding disc, so that the corn kernel crushing effect is not changed, the medicament can enter the premixing tank in batches in the rotating process of the rotary drum so as to be premixed, and the medicament can be quickly mixed with the solution after being discharged out of the premixing tank after being mixed; the whole process realizes integrated operation, so that the production efficiency is improved.

The invention is suitable for the technical field of plant modeling analysis, and provides a discrete element method-based multi-moisture-content corn kernel model construction method, which comprises the following steps of: analyzing the geometrical morphology and characteristic size parameters of mature-period corn kernels with the moisture content of 12-30% of a variety to be modeled, and determining the characteristic size change condition of the corn kernels; analyzing the feature size parameters to obtain geometric parameters of the basic corn kernel model; utilizing a Sigmoid function to be matched with a matrix equation to predict the volume size change of the grains with different water contents; according to an analysis result of the geometric morphology, determining a filling ball arrangement mode of the basic corn kernel model, calculating coordinates of filling balls, and establishing a geometric model; contact parameters of the basic model are determined, the surface adhesion behavior change condition is predicted through a Sigmoid function in cooperation with a matrix equation and a Linear Cohesion model, and a humidity gradient coupling HM-LC model is established. The constructed model accords with the actual moisture content change condition characteristics of the corn kernels, and is suitable for agricultural product processing and production processes.

The invention discloses an Indel marker related to a corn kernel protein content character and application of the Indel marker, and belongs to the technical field of plant molecular genetics and crop molecular design breeding. The Indel marker is located on a gdh2 gene of a chromosome 10 of a corn genome, and insertion or deletion of a nucleotide sequence as shown in SEQ ID NO.5 occurs in an intron region between a second exon and a third exon. By applying the molecular marker-assisted selection technology, high-protein new germplasms S3317 (the crude protein content is 17.0%) and JS231148 (the crude protein content is 15.6%) have been successfully cultivated, the increase amplitudes of the high-protein new germplasms and JS231148 are both more than 15% compared with those of the conventional control, and the lysine content reaches 0.41% and reaches the national high-quality protein corn standard.

The invention relates to a gene ZmILR1 for controlling the size of a corn kernel as well as a molecular identification method and application of the gene ZmILR1, and belongs to the technical field of plant genetic breeding and functional gene research. The ZmILR1 gene encodes an IAA-amino acid hydrolase, mutation of the IAA-amino acid hydrolase causes corn kernels to become smaller, and overexpression of the gene can create a corn material with increased kernel length, kernel width and hundred-kernel weight. A functional molecular marker A1A4 is developed according to the sequence difference of the mutant gene and a wild type gene at the DNA level, and can be used for rapid identification and screening of small-grain corn materials. The invention provides a theoretical basis and an application tool for analyzing a molecular mechanism of the corn grain size and developing molecular marker-assisted breeding and hybrid seed breeding, and provides important gene resources and technical support for high-yield and high-quality molecular breeding of corn.

The invention discloses a mechanism and data fusion driven wheat and corn harvesting and threshing grain damage rate evolution prediction method. The method comprises the following steps: 1, acquiring response data of wheat or corn grain damage rate along with time change under different threshing working conditions based on a bench test; 2, on the basis of a discrete element simulation analysis result, constructing a wheat and corn threshing grain damage rate physical model to obtain response data of the grain damage rate changing along with time under different threshing working conditions; 3, constructing a wheat corn harvesting and threshing grain damage rate prediction model training data set; 4, establishing a wheat corn harvesting and threshing grain damage rate evolution prediction network model driven by mechanism and data fusion; 5, a loss function of the prediction model is established and trained, and an optimal grain damage rate evolution prediction model is obtained and used for predicting the grain damage rate of wheat and corn harvesting and threshing. According to the method, the evolution trend of the grain damage rate in the wheat and corn harvesting and threshing process can be accurately obtained in advance, and a basis is provided for wheat or corn harvesting and threshing self-adaptive damage suppression regulation and control.

The invention discloses a bidirectional clamping feeding type corn single ear thresher, which relates to the technical field of agricultural machinery and comprises a box body, the box body is divided into an upper cavity and a lower cavity through a workbench, clamping threshing devices are symmetrically arranged on the left side and the right side of the upper cavity, and an ear placing device is arranged between the two clamping threshing devices. A screen plate for screening corn kernels and corncobs is obliquely arranged in the lower cavity; the clamping and threshing device comprises a first sliding rail transversely arranged in the upper cavity, a clamping and threshing shell slidably clamped to the first sliding rail through a sliding rail base, and a first linear driving mechanism driving the clamping and threshing shell to reciprocate along the first sliding rail. The clamping and threshing module is arranged at the end, close to the ear placing device, of the clamping and threshing shell, and the composite driving mechanism is arranged in the clamping and threshing shell and drives the clamping and threshing module to move and rotate. According to the scheme, corn ears are clamped in a self-adaptive mode through the clamp, and feeding type or rotary rubbing type threshing is carried out through the self-adaptive cutter.