TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The acidifying acid is hydrochloric acid or sulfuric acid. The alkali water is aqueous solution of sodium hydroxide or potassium hydroxide (0.02-1.0 mol/L).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The acidifying acid is propionic acid, acetic acid, formic acid or its aqueous solution. The dosage of acid is 0.2-1.0 N/kg of medical material. The Astragalus root is Astragalus membranaceus var. mongholicus, A. membranaceus, A. chrysopterus, A. ernestii, A. floridus, A. tongolensis, or A. complanatus. Preferred Properties: The pH of total astragaloside saponin solution after being acidified by acid is 2.5-4.5. Preferred Method: The method includes taking Astragalus root piece or Astragalus root section, using solvent to carry out extracting, and obtaining clarified aqueous solution by extracting liquid; making the aqueous solution pass through macroporous resin column, and using normal water to wash solution until sugar reaction is negative; using alkali to remove phenolic acid substance, and using alkali water to elute sampled resin until being colorless; using acid to remove inorganic salt, using water to elute alkali-washed resin until neutral, and using acidic water to carry out eluting, and continuously using water to elute solution until neutral; using methanol, ethanol or mixed solvent containing water, collecting eluent, and condensing eluent until small volume and no organic solvent; and basifying condensed liquid, heating liquid to carry out hydrolyzing, and obtaining total astragaloside saponin solution. The hydrolysis alkali concentration is 0.1-1.0 N/L and hydrolysis temperature is 40-100 degrees C.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The macroporous resin is non-polarity or weak-polarity macroporous resin, comprising styrene resin, vinyl styrene resin, methyl styrene resin and acrylonitrile resin. The macroporous resin is D101 macroporous resin, AB-8 macroporous resin, HPD100 macroporous resin, D140 macroporous resin or DA macroporous resin (0.1-5.0 times of Astragalus root material).