57 results about "Instant tea" patented technology

The utility model discloses automatic ultramicro instant tea powder extraction equipment which comprises a stirring kettle, an injection pipe is fixedly arranged at the top end of the stirring kettle in an embedded mode, an electromagnetic valve is fixedly arranged at the lower end of the stirring kettle in an embedded mode, a hose is fixedly arranged at the lower end of the electromagnetic valve, and a cover plate is fixedly arranged on the outer side of the lower end of the hose. A fixed cylinder is fixedly arranged at the lower end of the stirring kettle, and a hollow block is fixedly embedded in the center of the interior of the fixed cylinder. When the tea extracting device is used, tea and an extracting agent are poured into the stirring kettle and then stirred and adsorbed, the electromagnetic valve is started, so that a mixture is injected into the screen barrel through the hose, then the first motor is started, the first motor drives the sleeve rod to rotate through the rotating shaft, so that the screen barrel rotates, and the extracting agent on the outer side of the tea is thrown out through centrifugal force; and the extracting agent is thrown on the inner side wall of the fixed barrel through meshes of the screen barrel and then is discharged through the discharging pipe, so that the extracting agent is collected to the maximum extent, and resource waste is prevented.

The utility model discloses a high reduction degree instant tea preparation device, relates to the technical field of instant tea preparation, and adopts the technical scheme that the high reduction degree instant tea preparation device comprises a freeze-drying box body, a supporting seat is fixedly connected in the freeze-drying box body, and a placing tray is in sliding fit with the supporting seat; a driving mechanism used for driving the containing disc to shake left and right is arranged in the freeze-drying box body. By arranging the driving mechanism capable of driving the placing disc to shake left and right, when the freeze dryer is used for freeze-drying materials, the driving mechanism can drive the placing disc to shake left and right, so that the materials on the placing disc are shaken, and the positions of the materials can be changed; the push rods located on the two sides of the containing disc can generate pushing force on the materials in the left-right shaking process of the containing disc, the direction of the materials is changed, the materials originally stacked on the lower portion can be fully dried, and therefore the reduction degree of instant tea can be effectively improved.

The invention provides a preparation method of low-temperature vacuum flash extraction coupled molecule embedding instant tea powder. The method comprises the following steps: performing low-temperature vacuum and ultrasonic synergistic extraction on a tea leaf raw material, separating to obtain tea soup, and recovering aroma components through an SCC system in the extraction process; concentrating the tea soup into a concentrated solution, and meanwhile, backfilling part of aroma components into the concentrated solution; further adding a composite embedding agent containing endogenous tea protein into the concentrated solution to form an embedding compound, then forming instant tea powder by using a specific drying technology, and meanwhile, backfilling the residual aroma components into the instant tea powder. The instant tea powder prepared by the preparation method realizes dual locking protection of aroma and taste substances, highly restores the flavor of original tea, is instantly dissolved in cold water, is clear and transparent in tea soup, delays oxidation of substances such as tea polyphenol and the like, and improves the storage stability.

1. Name of the designed product: packing box (Oriental leaf instant tea machine). 2. Use of the designed product: used as packing box. 3. Design points of the designed product: combination of product shape and pattern. 4. Picture or photo best showing the design points: perspective view.

1. Name of the product of this design: packaging bag (instant tea). 2. Purpose of this design product: used as product packaging bags. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the key points of the design: main view. 5. This product is a thin product, so the left view is omitted; this product is a thin product, so the right view is omitted; this product is a thin product, so the top view is omitted; this product is a thin product, so the bottom view is omitted.

The invention discloses an instant tea point food and a preparation method thereof. The preparation method of the instant tea point food comprises the following steps: blanching and cooling the tea point raw materials, and putting the cooled tea point raw materials in a sugar water solution for sugar boiling to prepare the original-taste instant tea point; removing moisture on the surface of the original-taste instant tea cake, and performing nitrogen-filled packaging and sterilization on the original-taste instant tea cake to prepare the instant tea cake food. According to the preparation method provided by the invention, the instant tea point food is prepared by combining high permeability with moisture control, sterilization and high-barrier packaging, preservatives and various food additives such as citric acid, sodium pyrosulfite and the like do not need to be used, hydrogen peroxide is not used for treatment, and a relatively long shelf life can be obtained. The invention provides a preparation scheme for preventing browning after high-temperature sterilization, and the instant tea point food keeps the original color of the product, is natural and attractive, is complete in tea point, is not easy to generate disintegrating slag, and has normal fragrance.

The utility model discloses a multifunctional instant heating type scented tea water dispenser which comprises a machine box, an instant heating device and a control center, wherein the instant heating device and the control center are arranged in the machine box. The front side of the case is provided with a [-shaped water drainage area; a base is arranged below the water drainage area, and a top seat is arranged above the water drainage area; the base is provided with a first drainage position and a second drainage position; water outlets are formed above the first water discharging position and the second water discharging position; the second water discharging position is provided with a supporting table and a supporting telescopic assembly; the supporting telescopic assembly can make the supporting table move up and down, and the supporting table is provided with a heat preservation heating assembly. The top of the supporting table is of a downwards-concave bowl-shaped structure. According to the tea pot, the supporting table can move up and down in a telescopic mode so as to be matched with glass flower tea pot containers of different heights, and meanwhile the effects of boiling water injection, heat preservation and scented tea boiling are achieved; moreover, the top of the supporting table is of a concave bowl-shaped structure, so that the glass flower teapot can be well centered and positioned, and the flower teapot is prevented from moving and misplacing.

The invention discloses production equipment and a production process of an instant Pu'er tea beverage, and belongs to the technical field of instant tea production.The production equipment comprises a container unit, the container unit comprises an upper seat mechanism and a lower seat mechanism, an elastic reset piece is arranged between the upper seat mechanism and the lower seat mechanism, and the upper seat mechanism comprises an electromagnet; and the lower seat mechanism comprises a metal block. Tea leaves in the container unit are baked through the baking oven, baking heat is continuously conducted to the thermosensitive medium part through the lower heat conduction base, and after the thermosensitive medium part absorbs heat energy transmitted by the heat conduction assembly, the thermosensitive medium part is heated to expand and drives all the turning plate assemblies to turn over the tea leaves through follow-up racks in the heat conduction assembly at the same time. When the thermosensitive medium part absorbs heat and is converted into a complete expansion state from an initial contraction state, the turning plate assembly rotates 90 degrees from an initial vertical state to be converted into a horizontal state, layered baking of tea leaves is achieved, overlapping and stacking of the tea leaves are reduced, and the tea leaves are heated more evenly during baking.

The utility model relates to a golden camellia instant tea drying device which comprises a drying cylinder, the bottom end of the drying cylinder is conical, a discharge pipe is arranged at the bottom end of the drying cylinder, a box cover is arranged at the top end of the drying cylinder, and a material spraying drying structure is arranged in the box cover. The utility model relates to the technical field of instant golden camellia powder drying equipment. According to the instant camellia nitidissima tea drying device, through the outer feeding pipe and the outer feeding cylinder, first airflow is introduced into the drying cylinder, wet materials are introduced into the drying cylinder through the inner feeding pipe and the inner feeding cylinder, second airflow is introduced into the drying cylinder through the flow guide pipe, and under the influence of the material spraying and drying structure, the wet materials are dried in the drying cylinder; and the flowing tracks of the first airflow, the wet material and the second airflow are parallel to one another, so that the first airflow or the second airflow can be effectively prevented from entering the cavity where the wet material is located, the wet material is prevented from being dried and hardened in the cavity between the second inner barrel and the third inner barrel, and the problem that the material spraying and drying structure is blocked is solved.

The invention discloses a processing method for improving clarity of instant tea, and belongs to the technical field of deep processing of tea leaves, the method mainly comprises the following steps: extracting and roughly filtering tea leaves to obtain primary tea soup; adding a compound enzyme into the primary tea soup, carrying out enzymolysis treatment, and then carrying out enzyme deactivation; sequentially performing ceramic membrane microfiltration, ultrafiltration membrane fine filtration and nanofiltration membrane concentration on the treated tea soup; quickly cooling the obtained concentrated solution, standing and aging at low temperature, and centrifuging at high speed to obtain supernatant liquid; and finally, drying to obtain the instant tea powder. According to the method, various substances causing turbidity in tea soup are systematically removed through the synergistic effect of exogenous enzymolysis, three-stage membrane integrated purification and low-temperature physical coagulation acceleration, and the method has the beneficial effects that the final clarity and cold water solubility of an instant tea product can be effectively improved, and the storage stability of the product is improved.

The utility model innovatively provides a tea drinking machine which comprises a cabinet body, a cup falling structure and a transferring structure, the cup falling structure and the transferring structure are located in the cabinet body, the transferring structure is used for bearing and transferring empty cups falling from the cup falling structure, the tea drinking machine further comprises a tea falling structure and a water injection structure, the tea falling structure comprises at least one vibration piece, dry tea is placed in the vibration piece, and the water injection structure is used for injecting water. The vibration part vibrates to shake the built-in dry tea into an empty cup on the transfer structure, and the water injection structure is used for injecting water into the cup with the dry tea; the tea making machine has the advantages that compared with traditional finished tea water, the instant tea making mode can avoid the problem that tea water goes bad or the taste of the tea water becomes poor.

The invention discloses a method for improving lipid-lowering activity of instant dark tea powder and application of the method, firstly, lipid-lowering active ingredients in dark tea, oolong tea and moringa oleifera leaves are extracted by adopting three methods respectively, the instant powder is prepared through a concentration freeze-drying process, and composite tea powder with the instant dark tea powder as a main material and the instant oolong tea powder and the instant moringa oleifera leaf powder as auxiliary materials is determined. The preparation process is simple, the total phenol content of the composite tea powder is larger than or equal to 18%, the polysaccharide content is larger than or equal to 20%, compared with instant dark tea, the content of lipid-lowering active ingredients such as polyphenol and polysaccharide is more balanced, and the pancreatic lipase inhibitory activity is improved by larger than or equal to 76%. The lipid-lowering activity of the instant dark tea powder is improved. The method can be applied to food and health care products.

The utility model discloses a concentrated instant tea powder extracting and separating device, which belongs to the technical field of tea powder extracting and separating devices and comprises a rack and a rotating disc, the rotating disc is mounted at the top end of the rack, an extracting and separating box is mounted at the top end of the rack on one side of the rotating disc, and a filling tank is mounted at the bottom end of the extracting and separating box. And a conveying device is installed at the bottom end of the filling tank, a limiting arc-shaped plate is installed at the top end of the rack on one side of the rotating disc, and a guide frame is installed at the top end of the rack on one side of the limiting arc-shaped plate. According to the concentrated instant tea powder extraction and separation device, the filled concentrated instant tea powder can be conveniently packaged and conveyed by the concentrated instant tea powder extraction and separation device, batch filling and conveying of the concentrated instant tea powder are facilitated, the filling and conveying time of each group of concentrated instant tea powder is shortened, the manual operation amount is reduced, and the production efficiency of the concentrated instant tea powder is improved.

The invention relates to the technical field of instant tea powder preparation, in particular to falling film evaporation concentration equipment and application in caffeine-enriched instant tea powder.The falling film evaporation concentration equipment comprises an evaporation concentration tank and two ultrafiltration devices connected with the evaporation concentration tank through a three-way pipe, and each ultrafiltration device comprises a drainage cover and a supporting cover which are connected with the three-way pipe; the drainage cover and the supporting cover are coaxial and detachably connected, and the outer side of the supporting cover is sleeved with an ultrafiltration membrane; the annular lug boss slides on the supporting cover and is positioned between the ultrafiltration membrane and the supporting cover, and the annular lug boss can jack up the ultrafiltration membrane; the cleaning cover is connected with the annular lug boss, and can cover the jacked position of the ultrafiltration membrane, so that the ultrafiltration membrane is fully cleaned, and the filtering effect of the ultrafiltration membrane is ensured.

The utility model discloses a kind of instant tea powder processing tea boiling pot, it includes: heating type base, the upper surface of the heating type base is fixedly connected with jar body, the lower end of the jar body is embedded in heating type base, the surface of the jar body is fixedly connected with additive opening, DC motor, the output of the DC motor is penetrated to the inside of jar body, the output of the DC motor is fixedly connected with spiral pipe, the lower end of the spiral pipe is fixedly connected with storage filter cartridge, the upper end of the storage filter cartridge is provided with two opposite additive ports, the inside of the spiral pipe is provided with screw rod, the screw rod is located in the inside of storage filter cartridge, the lower end of the screw rod and the lower inner wall of storage filter cartridge are fixedly connected with pressure disc. Through the above structure, it is convenient to concentrate tea leaves, and the release effect of tea aroma of tea leaves is improved using stirring and extruding mode.

The utility model discloses a kind of equipment of extracting fragrance of instant tea powder, including box, the right side of the box is fixedly connected with conveying cylinder, the outer surface of the conveying cylinder is fixedly connected with through pipe, the top of the through pipe is fixedly connected with storage hopper, the right side of the conveying cylinder is installed with driving motor, the inner wall of the conveying cylinder is fixedly embedded with bearing, the inner ring of the bearing is fixedly connected with spiral conveying rod.This device is rotated by the driving motor set and then can automatically transport instant tea powder, realizes the automatic feeding of instant tea powder, without manual feeding to extract fragrance, improve work efficiency, enhance the practicability of equipment, using the setting of vibration motor, cooperate with two groups of springs simultaneously, so that vibration shell can vibrate, make instant tea powder continue to shake and disperse in the process of extracting fragrance, avoid static piling, ensure that extracting fragrance is evenly and fully, improve the product quality of instant tea powder.

1. The name of the product of this design: packaging bottle (new packaging for Yike Huoquan instant tea). 2. Purpose of this design product: used for packaging liquids. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

1. The name of this design product: packaging box (new packaging for Yike Huoquan instant tea). 2. Purpose of this design product: used for packaging products. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The utility model provides an instant tea processing tower type countercurrent extraction device, which comprises an extraction tank and a stirrer positioned in the extraction tank, the stirrer comprises a rotating shaft rotationally connected with the top of the extraction tank, the bottom of the rotating shaft is fixedly connected with an upper hanging ring, the bottom of the upper hanging ring is connected with a lower hanging ring positioned below the upper hanging ring through a telescopic rod, and the lower hanging ring is fixedly connected with the top of the extraction tank. The upper hanging ring and the lower hanging ring are hinged through a V-shaped hinge frame. According to the utility model, the rotating shaft, the upper hanging ring, the lower hanging ring, the telescopic rod and the V-shaped hinging frame are arranged, so that the rotating shaft can drive the V-shaped hinging frame to revolve around the rotating shaft when rotating, a row of flow guide pipes which are obliquely distributed are arranged on the two inclined rods on the V-shaped hinging frame, and the flow guide pipes can upwards guide stock solution in the extraction tank when the V-shaped hinging frame revolves; through the arrangement, the tea leaf stock solution is dispersed more rapidly, the whole stirring device has a telescopic function by arranging the groove-shaped frame for lifting the lower lifting ring and the control air cylinder, and lifting of the bottom plate in the extraction tank is not affected.

The invention relates to the field of dogwood, in particular to application of dogwood freeze-dried powder, instant tea, pigment and a combination thereof in food and medicine. The research improves and optimizes the adverse qualities of low leaching rate, sour and astringent taste and the like, and the instant tea with excellent quality is prepared. Pretreatment of a dogwood sample: putting the cleaned dogwood fruits into an electrothermal constant-temperature blast drying box at 60 DEG C to be dried for 1 hour, and then crushing the dogwood fruits into dogwood powder by using a high-speed multifunctional crusher; the water extraction method comprises the following steps: weighing 1g of dogwood powder sample, putting the dogwood powder sample into a 25mL conical flask, measuring 20mL of purified water by using a measuring cylinder, and adding the purified water into the conical flask; putting the mixture on an electric furnace and boiling until the mixture is slightly boiled for 40min; a compound enzyme extraction method: cooling to room temperature of 25 DEG C, then adding 2.40 mL of prepared compound enzyme with the ratio of cellulase to pectinase being 1: 1, and carrying out enzymolysis for 30 minutes; and freeze-drying.

The invention belongs to the technical field of food processing, and particularly relates to a treatment method for removing caffeine from tea water, in particular to a preparation method of low-caffeine tea water capable of effectively reducing the caffeine content in the tea water and well keeping original flavor substances of tea leaves, and a preparation method of low-caffeine tea powder prepared on the basis of the method. The method specifically comprises the following steps: taking tea leaf powder as a raw material, soaking the tea leaf powder in cold water, extracting and removing caffeine in tea water by using dichloromethane to obtain low-caffeine tea water, and finally removing water to obtain the low-caffeine instant tea powder. The method is low in production cost and easy to industrially popularize and apply.

This invention relates to the field of centrifugal separation technology, specifically to a cold precipitate centrifugal separation device and its application in the production of instant tea powder. The device includes: a base plate and a centrifugal tank fixed to the base plate, with a cover plate hinged to the top of the centrifugal tank; a filter tank rotatably installed inside the centrifugal tank, the outer circumferential wall of the filter tank having multiple circumferentially equidistant filter holes; a centrifugal assembly connected to the filter tank on the base plate; a rotary feeding mechanism disposed on the cover plate for guiding the cold precipitate into the filter tank for centrifugal separation; and a scraping assembly disposed on the cover plate, with a scraper connected to the scraper. The scraping assembly can control the movement of the scraper to break the continuous adhesive surface of the tea polysaccharide-containing filter cake and guide the material away from the filter tank, preventing the material from being re-adsorbed onto the screen due to residual centrifugal force or airflow disturbance.

The invention discloses a preparation method of high-water-solubility compound tartary buckwheat flavone instant tea, which comprises the following steps: carrying out microencapsulation wrapping on tartary buckwheat flavone through corresponding auxiliary materials, compounding with a liquorice extract, a momordica grosvenori extract, a ginseng extract, an astragalus membranaceus extract and the like, and carrying out spray drying by using a nitrogen protection spray dryer to obtain the high-water-solubility compound tartary buckwheat flavone instant tea. The high-water-solubility compound tartary buckwheat flavone instant tea powder is obtained. The utilization rate and solubility of the tartary buckwheat flavone are good, and the tartary buckwheat flavone is compounded with the liquorice extract, the momordica grosvenori extract, the ginseng extract, the astragalus membranaceus extract and the like, so that the physiological functions of the product are enriched, and the taste is improved.

The invention relates to the technical field of food processing, and particularly discloses a method for removing pesticide residues in instant tea powder. The method comprises the following steps: preparing instant tea powder containing pesticide residues into a solution, and adding a compound pretreatment agent; pretreatment is performed through a two-stage nanofiltration membrane series system with different molecular weight cut-off; after the trapped fluid is concentrated, a compound resin column is selected for adsorption according to the pesticide residue screening result; online ultraviolet spectrum monitoring is adopted, high-purity ethanol elution fractions are collected section by section, and residual liquid is refluxed and reused; and finally, carrying out vacuum concentration and temperature-controlled spray drying to obtain a zero-pesticide-residue product. Through cooperation of multiple technologies of function protection, multi-stage separation, precise adsorption and intelligent control, the problems of low removal rate of pesticide residues, large loss of active ingredients, deterioration of flavor and the like in a traditional method are effectively solved, the active ingredients and the flavor of the product are reserved while organic phosphorus and pyrethroid pesticide residues are efficiently removed, and the product quality is improved. The international standard is met.

An automatic cleaning system of an instant tea machine comprises a tea barrel assembly and a refrigeration assembly, the tea barrel assembly comprises a tea barrel body, a water outlet pipe and a feeding electromagnetic valve, and the refrigeration assembly comprises a shell, a refrigeration pipeline, a refrigeration body, a metering pump, a three-way electromagnetic valve and a controller. A tea outlet nozzle; and a liquid outlet. According to the automatic cleaning system of the instant tea making machine, the water outlet end of the metering pump is communicated with the three-way electromagnetic valve, and the two water outlet ends of the three-way electromagnetic valve are communicated with the tea outlet and the liquid outlet respectively, so that after the tea outlet is cleaned, cleaning water can be introduced into the liquid outlet to be discharged, and the cleaning efficiency is improved. The cleaning water can be directly guided to a preset position only by fixedly mounting a water pipe at the liquid outlet, so that the cleaning process is simplified, and automatic cleaning is realized.

The utility model relates to the technical field of instant tea powder detection, and discloses an instant tea powder tea polysaccharide content detection device which comprises a base and a supporting frame, a mixing box is arranged at the upper end of the supporting frame, a lifting plate is arranged at the upper end of the mixing box, an electric telescopic rod is arranged at the upper end of the supporting frame, and the upper end of the electric telescopic rod is connected with the lifting plate. A driving motor is arranged at the upper end of the lifting plate, a rotating shaft is arranged at the lower end of the lifting plate, stirring blades are arranged on the outer side of the rotating shaft, and a stirring mechanism is arranged at the lower end of the rotating shaft; the stirring mechanism comprises a mounting seat, the mounting seat is connected with the rotating shaft, a rotating rod is arranged at one end of the mounting seat, the rotating rod is a hard strip-shaped rod and is movably connected with the mounting seat, a stirring strip is arranged at one end of the rotating rod, and one end of the stirring strip is fixedly connected with the rotating rod. According to the tea polysaccharide detection device, the stirring mechanism is arranged, so that instant tea powder precipitated at the bottom of the mixing box can be stirred in the mixing process, the instant tea powder is mixed more uniformly, and the accuracy of a tea polysaccharide detection result is improved.

The utility model discloses a portable ready-to-drink instant tea powder small can package, and belongs to the technical field of beverage packages. In order to solve the problem that tea leaves carried outdoors are inconvenient to brew, the tea powder tank and the water bottle are designed to be separated, and independent storage and brewing at any time are achieved through threaded connection and a sealing structure. Fresh tea powder is locked through the independent sealing aluminum foil, the tea bag is compatible with a mineral water bottle opening, tea brewing is facilitated, the tea bag can be separated from a liquid bottle, the tea bag can enter limited areas such as airports and amusement parks, the tea bag has the advantages of being high in portability, simplifying tea brewing steps and being sanitary and fresh, meanwhile, food additives are prevented from being used, and the drinking safety and convenience of a user are improved.

The utility model discloses an instant tea functional component isolation protection device, relates to the technical field of instant tea protection, and solves the problems that in the prior art, when tea leaves are placed in a protection device for isolation, the fixation mode is not good, the sealing performance is easy to reduce, and then the tea leaves are degraded due to external factors. A protective cylinder is fixedly installed on the chassis, a control button is arranged on the outer wall of the protective cylinder, a support is fixedly connected to the edge of the protective cylinder, a rotating frame is hinged to the support, an isolation hood is fixedly connected to one end of the rotating frame, a light shield is arranged outside the isolation hood, and a connecting block is fixedly connected to the periphery of the bottom of the isolation hood. The bottom of the connecting block is fixedly connected with a locking block, and a locking seat is fixedly installed on the protective cylinder. According to the utility model, the locking mechanism can be used for better locking the isolation cover and the protection cover, so that the sealing performance is improved, and the condition that tea leaves are degraded due to external factors is avoided.

The utility model discloses a capsule type instant tea making box which comprises two sets of tea making box bodies which are symmetrically arranged, and the two sets of tea making box bodies are detachably spliced in a sealed mode. The tea making box main body comprises a cup body with an opening at one end, first clamping parts which are distributed along the circumference at equal intervals are arranged at the opening of the cup body, second clamping parts are arranged between the adjacent first clamping parts, positioning grooves which are concave inwards are formed in the inner walls of the first clamping parts, limiting blocks which are convex outwards are arranged on the outer walls of the second clamping parts, and the limiting blocks are arranged in the positioning grooves. The two cup bodies are connected through clamping of the positioning grooves and the limiting blocks. The utility model belongs to the technical field of tea sets, and particularly provides a capsule type instant tea making box which is used for solving the problems that in the prior art, water leakage is prone to occurring, use is not stable enough, and cost is high.

The invention discloses a method for preparing a green tea extract, relates to the technical field of plant extraction, and comprises a solvent system for preparing the green tea extract and a method for preparing the green tea extract, the solvent system for preparing the green tea extract contains ethanol and ethyl acetate, the method for preparing the green tea extract comprises the following steps: drying and grinding tea leaves into powder, preparing a solvent system, preparing an extracting solution, cooling and filtering to obtain the corresponding green tea extract, and recycling a solvent. According to the method for preparing the green tea extract, the temperature during concentration is reduced, oxidation and dissipation of heat-sensitive substances such as aroma and taste in green tea are effectively prevented, the preparation method is simple, the extract is strong in aroma and strong in taste, the aroma, the taste and the soup color of tea soup of the brewed green tea are close to those of original green tea, and even the taste of the original tea is improved; the prepared green tea extract is widely applied to instant tea drinks, foods, tobaccos, daily chemicals and health-care products.