NOVELTY - Preparing astragaloside traditional Chinese medicine extract comprises weighing dry radix astragali medicinal materials, crushing medicinal materials into crude powder and then placing into filter bag, adding radix astragali in extraction kettle with edible alcohol, adding milkvetch into extracting agent to obtain extraction liquid, separating the extraction liquid into stillage, extracting, evaporating and recycling the residual liquid to obtain radix astragali extraction liquid, mixing radix astragali extraction liquid, and decompressing and concentrating the radix astragali extraction liquid.    USE - The method is useful for preparing Astragaloside traditional Chinese medicine extract (claimed).    ADVANTAGE - The method is capable of economically preparing the traditional Chinese medicine extract in an eco-friendly manner with short production period, strong adaptability and high yield of greater than or equal to 90%.    DETAILED DESCRIPTION - Preparing astragaloside traditional Chinese medicine extract comprises weighing dry radix astragali medicinal materials, crushing medicinal materials into crude powder with particle size of 10-60 meshes and then placing into 100 meshes of filter bag, adding radix astragali in extraction kettle for 0.2-2 times with 95% of edible alcohol, then extracting at temperature of 20-50 degrees C for 10-60 minutes, adding milkvetch into 3-8 times of extracting agent at pressure of 0.3-1.6 Mpa and temperature of 20-60 degrees C, extracting at 60 degrees C for 20 minutes to obtain extraction liquid, separating the extraction liquid into stillage under pressure of 0.04-0.1 Mpa, extracting, evaporating and recycling the residual liquid to obtain radix astragali extraction liquid, repeating the extracting process for 2-6 times, mixing radix astragali extraction liquid, decompressing and concentrating the radix astragali extraction liquid at pressure of 0.05-0.09 Mpa and temperature of 50-80 degrees C, decompressing and concentrating until the ethanol content in the concentrated solution is less than 5% to obtain concentrated solution, placing obtained concentrated solution in a spray dryer at atomizer rotating speed of 40 MHz, peristaltic pump feeding speed of 10-20 Hz and cyclone separating pressure of 0.6 MPa, adding the medicine liquid with relative density of 1.05-1.10, an air inlet temperature of 140-165 degrees C and air outlet temperature of 80-90 degrees C, drying the powder to obtain radix astragali extract I with extract I content of 5-10% and water content of less than 5%, preparing the radix astragali extract II by adding concentrated solution in 2-4% of sodium hydroxide for 1-6 hours, adjusting the pH value to neutral by concentrated liquid of inorganic acid, alkalizing and activating the concentrated solution, processing the activated solution with macroporous resin column at speed of 3 BV/H and then water washing trapped resin column at eluting speed of 3-5 BV/H, then alkali washing using 1-3% of sodium hydroxide solution trapped resin column at eluting speed of 2-4 BV/H, then adding 20-50% of alcohol at eluting speed of 2-4 BV/H to elute till the effluent liquid is pale yellow, collecting the alcohol washing liquid, then adding 95% of alcohol eluting speed of 2-4 BV/H, decompressing and concentrating in the spray dryer at atomizer rotating speed of 40 MHz, peristaltic pump feeding speed of 10-20 Hz and cyclone separating pressure of 0.6 MPa, adding the medicine liquid with relative density of 1.05-1.10, an air inlet temperature of 140-165 degrees C and air outlet temperature of 80-90 degrees C, to obtain radix astragali extract II with extract II content of 30-40% and water content of less than 5%, preparing the radix astragali extract II1 by decompressing and concentrating the collected solution using 60-80% of alcohol lotion to the relative density of 1.3-1.4 and then standing at temperature of 2-10 degrees C for 3-5 days, drying the crystal at 70 degrees C under the condition of water washing and filtering, drying until the water content is less than 2%, then crushing to obtain radix astragali extract III.