A compound invigorating instant powder of rhizoma polygonati, medlar, red date and mulberry and a preparation method thereof

Abstract

The present application relates to the technical field of instant beverage, and in particular to a kind of Huangjing Gouqi Hongzao Sangshen compound invigorating instant powder and a preparation method thereof, after the weight ratio of Huangjing, Gouqi, Hongzao and Sangshen is properly controlled, the viscous solid prepared by mixing is extracted twice with water, combined and filtered, then pre-cooled and vacuum freeze-dried to prepare the instant powder, so that the specific weight ratio is matched with the specific extraction process to prepare the instant powder product, the total sugar content of the product reaches 356.51-439.40 mg / g, the total flavone content reaches 5.43-5.56 mg / g, and the total saponin content reaches 35.32-35.69 mg / g, which significantly improves the content of core beneficial ingredients in the instant powder.

Description

Technical Field

[0001] This invention relates to the field of instant beverage technology, and in particular to a compound nourishing instant powder of Polygonatum sibiricum, wolfberry, red date and mulberry and its preparation method. Background Technology

[0002] Polygonatum, wolfberry, red dates, and mulberries are all traditional medicinal and edible ingredients. Polygonatum has the effects of nourishing yin and tonifying the kidneys, invigorating qi and strengthening the spleen; wolfberry has the effects of nourishing the liver and kidneys, benefiting essence and improving eyesight; red dates have the effects of invigorating the middle jiao and replenishing qi, nourishing blood and calming the mind; and mulberries have the effects of nourishing yin and replenishing blood, promoting body fluid and moisturizing dryness. Combining these four ingredients can achieve multi-dimensional nourishing effects. Moreover, with the Chinese people's urgent pursuit of health and wellness products, the development and production of instant beverages or food additives from a large number of medicinal and edible ingredients has received widespread attention from those skilled in the art, and a great deal of research has been carried out.

[0003] For example, patent application number 202310141876.7 discloses the following: Ginseng and Polygonatum are pulverized to obtain ginseng-polygonatum powder. The ginseng-polygonatum powder is added to an ethanol solution, heated for extraction, filtered to obtain filtrate and residue. The residue is added to an expanding solvent composed of CO2 and isobutanol, pressurized to form an expanding system, and subjected to ultrasonic extraction. After extraction, the pressure is released, and the extract is filtered. The filtrate and extract are combined, and then subjected to reduced pressure rotary evaporation to remove ethanol and isobutanol, yielding ginseng-polygonatum extract. Red dates are pitted and pulverized together with wolfberries to obtain red date-wolfberry powder. The red date-wolfberry powder is mixed with water and ground using a colloid mill to obtain a slurry. The slurry is added to an ethanol solution, ultrasonically extracted, and after extraction, filtered to obtain filtrate, and then subjected to reduced pressure extraction. Ethanol was removed by rotary evaporation to obtain jujube and wolfberry extract. Mulberry, water, citric acid, and calcium ascorbate were added to a pulping machine and pulped to obtain a slurry. The slurry was then microwaved and ultrasonically treated. After ultrasonic treatment, reflux extraction was performed to obtain mulberry extract. Cordyceps militaris was ultra-finely pulverized, pre-frozen and frozen with water, and then thawed in a microwave. The pH was adjusted to 6-6.5, and cellulase and hemicellulase were added for enzymatic hydrolysis. After enzymatic hydrolysis, ultrasonic treatment was performed to inactivate the enzymes, and the filtrate was collected to obtain Cordyceps militaris extract. The ginseng and polygonatum extract from step S1, the jujube and wolfberry extract from step S2, the mulberry extract from step S3, and the Cordyceps militaris extract from step S4 were mixed, sterilized, and used to prepare oral liquids and other beverages. The published content indicates that the research focuses on the health benefits of combining ginseng, polygonatum, jujube, wolfberry, mulberry, and Cordyceps militaris to enhance immunity.

[0004] For example, patent application number 202510527460.8 discloses a preparation method based on medicinal and edible plants such as black beans, red dates, mulberries, hawthorns, goji berries, prepared rehmannia root, and polygonatum, combined with purple cabbage powder, pumpkin powder, dandelion root powder, tremella polysaccharide, quinoa germ powder, and bamboo leaf flavonoid extract. The preparation involves co-fermentation with Lactobacillus acidophilus and Clostridium butyricum. The method includes raw material pretreatment, mixed saccharification, constant-temperature anaerobic fermentation, post-ripening, sterilization, and drying. The product is rich in polyphenols, flavonoids, short-chain fatty acids, and oligosaccharides, and possesses significant antioxidant, intestinal cleansing, detoxification, skin-nourishing, and immune-regulating functions in liquid beverages, powders, or freeze-dried oral granules.

[0005] However, existing compound instant beverages or oral liquids still have significant shortcomings: unreasonable formulation ratios and inappropriate extraction processes result in poor efficacy of the products and low retention rates of core beneficial components. In particular, the compatibility between raw material ratios and extraction processes has a significant impact on the content of polysaccharides, flavonoids, and saponins in the products, leading to poor product quality and difficulty in meeting market demands. Summary of the Invention

[0006] Based on the above-mentioned technical problems, the present invention provides a compound nourishing and quick-dissolving powder of Polygonatum, wolfberry, red date and mulberry and its preparation method.

[0007] The specific technical solution is as follows:

[0008] One of the purposes of this invention is to provide a compound nourishing and quick-dissolving powder of Polygonatum, wolfberry, red date and mulberry. The raw materials are in the following parts by weight: 40-60 parts of Polygonatum, 20-40 parts of wolfberry, 20-40 parts of red date and 20 parts of mulberry.

[0009] Preferably, the amounts of wolfberry, red date, and mulberry in the raw material components are equal, and the amount of polygonatum is twice the amount of wolfberry.

[0010] Preferably, the raw material components, by weight, are: 40 parts Polygonatum, 20 parts Lycium barbarum, 20 parts jujube, and 20 parts mulberry.

[0011] Preferably, the amount of wolfberry and red dates in the raw material components is equal, and the amount of polygonatum is 3 times the amount of mulberry, and the amount of wolfberry is 2 times the amount of mulberry.

[0012] Preferably, the raw material components, by weight, are: 60 parts Polygonatum, 40 parts Lycium barbarum, 40 parts jujube, and 20 parts mulberry.

[0013] In this invention, the Polygonatum is a steamed Polygonatum obtained by three steaming processes; the three steaming processes are as follows: first, the Polygonatum is steamed and then dried until the moisture content of the Polygonatum before steaming reaches 60%, to obtain steamed Polygonatum; the steamed Polygonatum is steamed a second time for 4 hours and then dried until the moisture content of the steamed Polygonatum reaches 60%, to obtain second-steamed Polygonatum; the second-steamed Polygonatum is steamed a third time for 3 hours and then dried until the moisture content of the second-steamed Polygonatum reaches 60%, thus obtaining the final product.

[0014] The second objective of this invention is to provide a method for preparing the above-mentioned compound nourishing and instant powder of Polygonatum sibiricum, wolfberry, jujube, and mulberry, comprising the following steps:

[0015] (1) Prepare steamed Polygonatum by steaming it three times; remove impurities from wolfberry and mulberry, rinse them with water and drain them, and set aside; remove the pits from red dates by hand and cut them into small pieces, and set aside.

[0016] (2) Mix the steamed Polygonatum, wolfberry, red dates and mulberry evenly, put them into a crushing and grinding equipment and grind them to obtain a viscous solid;

[0017] (3) Place the viscous solid in an Erlenmeyer flask, add water at a material-to-liquid ratio of 1:15, add water under reflux in a water bath and heat to 100°C, and extract under constant temperature for 1 hour with magnetic stirring. Filter to obtain the initial extract and the initial filter residue. Add water to the initial filter residue at a material-to-liquid ratio of 1:5, add water under reflux in a water bath and heat to 100°C, and extract under constant temperature for 1 hour with magnetic stirring. Filter to obtain the re-extract and the re-filter residue. Combine the initial extract and the re-extract and filter with 200-mesh gauze to obtain the extract.

[0018] (4) Transfer the extract to a freezing container, pre-cool it at -20℃ for at least 12 hours, and then freeze-dry it in a vacuum freeze dryer for at least 48 hours to obtain the extract.

[0019] Preferably, the magnetic stirring speed is 300 r / min.

[0020] Preferably, the vacuum freeze dryer has a vacuum degree ≤10Pa and a cold trap temperature ≤-50℃.

[0021] Compared with the prior art, the technical effects of this invention are reflected in:

[0022] This invention creates a viscous solid by properly controlling the weight ratio of Polygonatum sibiricum, Lycium barbarum, jujube, and mulberry. The viscous solid is then extracted twice with water, combined, filtered, pre-cooled, and freeze-dried under vacuum to prepare an instant powder. This specific weight ratio matched with a specific extraction process produces an instant powder product with a total sugar content of 356.51-439.40 mg / g, a total flavonoid content of 5.43-5.56 mg / g, and a total saponin content of 35.32-35.69 mg / g, significantly increasing the content of the core beneficial components in the instant powder.

[0023] This invention employs a three-stage steaming process for Polygonatum, which helps reduce the irritation of Polygonatum itself and improves the conversion rate of its active ingredients. Combined with the preparation of a viscous solid from a mixture of wolfberry, jujube, and mulberry, followed by a water extraction and freeze-drying process, this avoids damage to the active ingredients and maximizes the retention of key beneficial components such as total sugar, total flavonoids, and total saponins. Simultaneously, the vacuum freeze-drying process results in a loose and porous powder that dissolves rapidly in room temperature water without any sediment residue, thus improving the solubility of the instant powder.

[0024] The raw materials used in this invention are of controllable quality, which helps to improve the quality of the product. The product is an instant powder, which does not require complicated brewing conditions. It is convenient to carry and consume, and can be used as a beverage, food additive, etc., with a wide range of market applications. Attached Figure Description

[0025] In order to enable those skilled in the art to fully understand the technical solution of the present invention, the following description is made in conjunction with the technical solution content and the accompanying drawings. This description is not intended to limit the technical solution of the present invention.

[0026] Figure 1 A process flow diagram is provided for this invention. Detailed Implementation

[0027] To facilitate a correct understanding of the present invention by those skilled in the art, and to enable them to fully understand the technical content of the present invention, the technical solution of the present invention will be further described below in conjunction with specific embodiments. However, this description does not limit the scope of protection claimed by the present invention. Those skilled in the art should not limit the scope of protection of the present invention to the following description. Any equivalent substitutions or changes made by those skilled in the art or those familiar with the art based on the present invention, and based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0028] In some embodiments, the compound nourishing and instant powder containing Polygonatum, wolfberry, jujube, and mulberry has the following raw material components by weight: 40-60 parts Polygonatum, 20-40 parts wolfberry, 20-40 parts jujube, and 20 parts mulberry. For example: 40 parts Polygonatum, 20 parts wolfberry, 20 parts jujube, and 20 parts mulberry. Another example: 60 parts Polygonatum, 40 parts wolfberry, 40 parts jujube, and 20 parts mulberry. Yet another example: 50 parts Polygonatum, 25 parts wolfberry, 25 parts jujube, and 20 parts mulberry, etc.

[0029] In a more preferred embodiment, the amounts of wolfberry, red date, and mulberry in the raw material components are equal, and the amount of polygonatum is twice that of wolfberry. For example, 40 parts polygonatum, 20 parts wolfberry, 20 parts red date, and 20 parts mulberry, combined with the water extraction process of this invention, result in an instant powder with a total sugar content of 439.40 mg / g, a total flavonoid content of 5.43 mg / g, and a total saponin content of 35.69 mg / g.

[0030] In a more preferred embodiment, the amounts of wolfberry and jujube in the raw material components are equal, and the amount of polygonatum is three times that of mulberry, while the amount of wolfberry is twice that of mulberry. For example, using 60 parts polygonatum, 40 parts wolfberry, 40 parts jujube, and 20 parts mulberry, combined with the water extraction process of this invention, the resulting instant powder has a total sugar content of 356.51 mg / g, a total flavonoid content of 5.56 mg / g, and a total saponin content of 35.32 mg / g.

[0031] In all embodiments of this invention, the Polygonatum is steamed Polygonatum obtained by three steaming processes; and the three steaming processes are as follows: first, the Polygonatum is steamed and then dried until the moisture content of the Polygonatum before steaming reaches 60%, to obtain steamed Polygonatum; the steamed Polygonatum is steamed a second time for 4 hours and then dried until the moisture content of the steamed Polygonatum reaches 60%, to obtain second-steamed Polygonatum; the second-steamed Polygonatum is steamed a third time for 3 hours and then dried until the moisture content of the second-steamed Polygonatum reaches 60%, thus obtaining the final product.

[0032] like Figure 1 As shown, in some embodiments, the preparation method of the compound nourishing and instant powder of Polygonatum, wolfberry, red date, and mulberry includes the following steps:

[0033] (1) Prepare steamed Polygonatum by steaming it three times; remove impurities from wolfberry and mulberry, rinse with water and drain the surface water, and set aside; remove pits from red dates manually and cut them into small pieces, and set aside; (2) Mix the steamed Polygonatum, wolfberry, red dates and mulberry evenly, put them into a crushing and grinding equipment and grind them to obtain a viscous solid; (3) Put the viscous solid into an Erlenmeyer flask, add water according to the material-liquid ratio (the mass ratio of viscous solid to water) of 1:15, add it by water bath reflux and heat it to 100°C, and stir with a magnetic stirrer. Stir and extract at constant temperature for 1 hour, filter to obtain initial extract and initial filter residue; add water to the initial filter residue at a material-to-liquid ratio (mass ratio of viscous solid to water) of 1:5, add water in a water bath and heat to 100°C, and extract at constant temperature for 1 hour with magnetic stirring, filter to obtain re-extract and re-filter residue; combine the initial extract and re-extract, filter with 200 mesh gauze to obtain extract; (4) transfer the extract to a freezing container, pre-cool it at -20°C under Polygonatum for at least 12 hours, and then put it into a vacuum freeze dryer and freeze dry for at least 48 hours to obtain the extract.

[0034] This preparation method involves mixing 60 parts of Polygonatum sibiricum, 40 parts of Lycium barbarum, 40 parts of jujube, and 20 parts of mulberry. This results in an instant powder with a total sugar content of 356.51 mg / g, a total flavonoid content of 5.56 mg / g, and a total saponin content of 35.32 mg / g. Alternatively, mixing 40 parts of Polygonatum sibiricum, 20 parts of Lycium barbarum, 20 parts of jujube, and 20 parts of mulberry yields an instant powder with a total sugar content of 439.40 mg / g, a total flavonoid content of 5.43 mg / g, and a total saponin content of 35.69 mg / g. In other words, based on the mixing ratio of Polygonatum sibiricum, Lycium barbarum, jujube, and mulberry, the appropriate selection and combination of extraction processes significantly affect the total flavonoid and total saponin content of the resulting instant powder, and also substantially influences the total sugar content, leading to significant quality variations in the resulting instant powder products.

[0035] In some embodiments, the magnetic stirring speed is 300 r / min.

[0036] In some embodiments, the vacuum freeze dryer has a vacuum degree ≤10Pa and a cold trap temperature ≤-50℃.

[0037] In order to better verify the technical effects of this invention, our research team conducted the following experimental studies:

[0038] Example 1

[0039] Weigh and mix 400g of Polygonatum sibiricum, 200g of Lycium barbarum, 200g of jujubes, and 200g of dried mulberries to obtain a mixture. Grind the mixture three times in a grinder, each grinding session lasting 2 minutes with a 1-minute interval. The grinder speed should be such that the material after three grinding sessions becomes a viscous solid with no obvious particulate matter. Place the viscous solid in an Erlenmeyer flask, add water at a mass ratio of 1:15 (viscous solid to water), and place the flask in a constant temperature water bath. Use a magnetic stirrer to heat the mixture to 100℃ at 300 rpm and maintain the temperature for 1 hour. Filter the mixture through 200-mesh gauze to obtain the initial extract and initial filter residue. Add water to the primary filter residue at a mass ratio of 1:5 (based on the mass ratio of viscous solids to water), place it on a constant temperature water bath, turn on the magnetic stirrer to heat to 100℃ at 300r / min and extract for 1h. Filter with 200-mesh gauze to obtain the re-extract and re-filter residue. Combine the primary extract and re-extract and filter with 200-mesh gauze to obtain the extract. Pour the extract into a stainless steel freezing pan and pre-cool at -20℃ until the extract is completely frozen (12h). Then place it in a vacuum freeze dryer (vacuum degree ≤10Pa, cold trap temperature ≤-50℃) and freeze for 48h. Take it out, pulverize it and pass it through a 100-mesh sieve to obtain the Polygonatum, Lycium barbarum, Jujube and Mulberry Compound Tonic Instant Powder.

[0040] Example 2

[0041] Based on Example 1, 600g of Polygonatum, 400g of Lycium barbarum, 400g of jujube, and 200g of mulberry were weighed and mixed to obtain a mixture. A viscous solid was prepared according to the preparation method of Example 1. Water was added to the viscous solid (the mass ratio of viscous solid to water was 1:15), and the initial extraction was completed according to Example 1 to obtain the initial extract and the initial filter residue. Water was added to the initial filter residue (the mass ratio of viscous solid to water was 1:5), and the re-extraction was completed according to Example 1. The mixture was then prepared according to the preparation method of Example 1 to obtain the Polygonatum, Lycium barbarum, jujube, and mulberry compound nourishing instant powder.

[0042] Example 3

[0043] Based on Example 1, after adding water, ultrasonic extraction was performed at a frequency of 20Hz, and all other processes were the same as in Example 1.

[0044] Example 4

[0045] Based on Example 2, after adding water, ultrasonic extraction was performed at a frequency of 20Hz, and all other processes were the same as in Example 2.

[0046] Example 5

[0047] Based on Example 1, Polygonatum was directly put into a pulverizer and ground three times, each grinding time was 2 minutes, with an interval of 1 minute. At the same time, the speed of the pulverizer was such that the material after three grindings was a sticky solid with no obvious particles, thus obtaining Polygonatum powder. The Polygonatum powder was then pre-treated according to the extraction method in Example 1 to obtain instant powder.

[0048] The yield, total sugar content, total flavonoid content, and total saponin content of the instant powders obtained in Examples 1 to 5 were detected and statistically analyzed. The results are shown in Table 1 below:

[0049] Table 1

[0050] Example 1 Example 2 Example 3 Example 4 Example 5 Yield, g 17.50 18.80 18.05 19.50 16.73 Total sugar, mg / g 439.40 356.51 345.98 393.10 123.64 Total flavonoids, mg / g 5.43 5.56 4.54 5.23 5.14 Total saponins, mg / g 35.69 35.32 30.34 28.44 39.49

[0051] As shown in Table 1, the present invention involves mixing Polygonatum sibiricum, Lycium barbarum, Jujube, and Mulberry in a mass ratio of 2:1:1:1 and preparing them into a viscous solid. This solid is then subjected to a matching water extraction process followed by pre-cooling, vacuum freeze-drying, and pulverization to produce an instant powder. Compared to the instant powder prepared by mixing Polygonatum sibiricum, Lycium barbarum, Jujube, and Mulberry in a mass ratio of 3:2:2:1, this instant powder has an increased total sugar content of 82.99 mg / g, an increased total saponin content of 0.37 mg / g, and a decreased total flavonoid content of 0.13 mg / g, with the total flavonoid content reaching 5.43 mg / g. Compared to ultrasonic water extraction, this instant powder has an increased total sugar content of 93.42 mg / g, an increased total saponin content of 5.35 mg / g, and an increased total flavonoid content of 0.89 mg / g.

[0052] This invention involves mixing Polygonatum sibiricum, Lycium barbarum, jujube, and mulberry in a mass ratio of 3:2:2:1 and preparing them into a viscous solid. Then, it undergoes a matching water extraction process, followed by pre-cooling, vacuum freeze-drying, and pulverization to prepare an instant powder. Compared with ultrasonic water extraction, this instant powder has a 36.49 mg / g lower total sugar content, a 6.88 mg / g higher total saponin content, and a 0.33 mg / g higher total flavonoid content.

[0053] In summary, the raw material ratios and preparation methods in this invention have synergistic effects. By combining appropriate raw material ratios with a specific water extraction process, this invention helps to significantly increase the content of polysaccharides and saponins while maintaining a relatively stable flavonoid content. In particular, water extraction after mixing Polygonatum sibiricum, Lycium barbarum, jujube, and mulberry in a mass ratio of 2:1:1:1 achieves optimal polysaccharide levels. Therefore, the instant powder product obtained by this invention can be produced using different raw material ratios combined with specific extraction processes, depending on the application requirements.

[0054] In addition, when 5g of the instant powder obtained in Examples 1 and 2 of this invention is weighed and added to 100mL of warm water at 25°C, and stirred until completely dissolved, the time required is 10s. Moreover, the solution is clear and transparent, without precipitation or layering.

[0055] After the finished products obtained in Examples 1 and 2 of this invention were sealed and packaged, they were stored at 25°C and 60% relative humidity for 6 months. Their sensory properties, total sugar content, total flavonoid content and total saponin content did not change significantly, so the shelf life is relatively long.

[0056] For any other matters not covered in this invention, they can be addressed by referring to existing technologies or common knowledge known to those skilled in the art, and by using conventional technical means.

Claims

1. A compound nourishing and instant powder containing Polygonatum sibiricum, Lycium barbarum, Jujube, and Mulberry, characterized in that... The ingredients, by weight, are: 40-60 parts Polygonatum, 20-40 parts Lycium barbarum, 20-40 parts red dates, and 20 parts mulberry.

2. The Polygonatum, Lycium, Jujube, and Mulberry Compound Nourishing Instant Powder as described in claim 1, characterized in that, The ingredients include equal amounts of goji berries, red dates, and mulberries, and the amount of polygonatum is twice that of goji berries.

3. The Polygonatum, Lycium, Jujube, and Mulberry Compound Nourishing and Instant Powder as described in claim 1 or 2, characterized in that, The raw material components, by weight, are: 40 parts Polygonatum, 20 parts Lycium barbarum, 20 parts jujube, and 20 parts mulberry.

4. The Polygonatum, Lycium, Jujube, and Mulberry Compound Nourishing and Instant Powder as described in claim 1, characterized in that, The ingredients include equal amounts of goji berries and red dates, and the amount of polygonatum is three times that of mulberry, while the amount of goji berries is twice that of mulberry.

5. The Polygonatum, Lycium, Jujube, and Mulberry Compound Nourishing and Instant Powder as described in claim 1 or 4, characterized in that, The raw material components, by weight, are: 60 parts Polygonatum, 40 parts Lycium barbarum, 40 parts jujube, and 20 parts mulberry.

6. The Polygonatum odoratum, Lycium barbarum, Jujube, and Mulberry Compound Nourishing Instant Powder as described in any one of claims 1-5, characterized in that, The Polygonatum is obtained by steaming Polygonatum through three steaming processes; the three steaming processes are as follows: first, the Polygonatum is steamed and then dried until the moisture content of the Polygonatum before steaming reaches 60%, to obtain steamed Polygonatum; the steamed Polygonatum is steamed a second time for 4 hours and then dried until the moisture content of the steamed Polygonatum reaches 60%, to obtain second-steamed Polygonatum; the second-steamed Polygonatum is steamed a third time for 3 hours and then dried until the moisture content of the second-steamed Polygonatum reaches 60%, thus obtaining the final product.

7. The preparation method of the compound nourishing and instant powder of Polygonatum sibiricum, Lycium barbarum, Jujube, and Mulberry as described in any one of claims 1-6, characterized in that, Includes the following steps: (1) Prepare steamed Polygonatum by steaming it three times; remove impurities from wolfberry and mulberry, rinse them with water and drain them, and set aside; remove the pits from red dates by hand and cut them into small pieces, and set aside. (2) Mix the steamed Polygonatum, wolfberry, red dates and mulberry evenly, put them into a crushing and grinding equipment and grind them to obtain a viscous solid; (3) Place the viscous solid in an Erlenmeyer flask, add water at a material-to-liquid ratio of 1:15, add water under reflux in a water bath and heat to 100°C, and extract under constant temperature for 1 hour with magnetic stirring. Filter to obtain the initial extract and the initial filter residue. Add water to the initial filter residue at a material-to-liquid ratio of 1:5, add water under reflux in a water bath and heat to 100°C, and extract under constant temperature for 1 hour with magnetic stirring. Filter to obtain the re-extract and the re-filter residue. Combine the initial extract and the re-extract and filter with 200-mesh gauze to obtain the extract. (4) Transfer the extract to a freezing container, pre-cool it at -20℃ for at least 12 hours, and then freeze-dry it in a vacuum freeze dryer for at least 48 hours to obtain the extract.

8. The method as described in claim 7, characterized in that, The three-stage steaming process involves first steaming the Polygonatum sibiricum until it is cooked and then drying it until the moisture content of the Polygonatum sibiricum before steaming reaches 60%, thus obtaining cooked Polygonatum sibiricum; then steaming the cooked Polygonatum sibiricum a second time for 4 hours and drying it until the moisture content of the cooked Polygonatum sibiricum reaches 60%, thus obtaining second-steamed Polygonatum sibiricum; and finally steaming the second-steamed Polygonatum sibiricum a third time for 3 hours and drying it until the moisture content of the second-steamed Polygonatum sibiricum reaches 60%, thus obtaining the final product.

9. The method as described in claim 7, characterized in that, The magnetic stirring speed is 300 r / min.

10. The method as described in claim 7, characterized in that, The vacuum freeze dryer has a vacuum degree ≤10Pa and a cold trap temperature ≤-50℃.

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