NOVELTY - Chinese gall is crushed, provided to a reactor, aqueous sodium hydroxide is added and acidified. 28-32 %mass Hydrochloric acid is added to gallic acid sodium solution, 2-4 wt.% active carbon is added, heated, filtered the resultant product, cooled to room temperature and centrifuged, to obtain crude gallic acid. The crude is provided into bleaching tank, deionized water is added, 9-12 wt.% activated carbon is added, heated at 85-95 degrees C for 30 minutes, filtered, cooled to room temperature, centrifuged and dried, to obtain gallic acid.    USE - Production of gallic acid used for medicinal material.    ADVANTAGE - The method efficiently, economically and environmentally-friendly provides clean gallic acid with yield of more than 90%.    DETAILED DESCRIPTION - Chinese gall is crushed to 20-60 meshes, provided into a reactor, aqueous sodium hydroxide is added, heated at 100-110 degrees C for 2.5-3.5 hours, and acidified, to obtain gallic acid sodium solution. 28-32 %mass Hydrochloric acid is added to the gallic acid sodium solution to adjust pH value of 2.8-3.2, 2-4 wt.% active carbon is added, heated at 85-95 degrees C, filtered using plate and frame filter press, cooled to room temperature and centrifuged, to obtain crude gallic acid. The crude is provided into bleaching tank, deionized water is added, 9-12 wt.% activated carbon is added, heated at 85-95 degrees C for 30 minutes, filtered, cooled to room temperature, centrifuged and dried, to obtain gallic acid. The waste generated in the gallic acid production is subjected into waste liquid adjusting tank, solvent is extracted, 15-20% sodium hydroxide is added and stripped, to obtain gallic acid sodium which is recycled to the process of producing gallic acid. The extracted waste in the process is regenerated using extractant which is added with domestic wastewater into the pH adjusting tank, lime is added, microbial acidification process is carried out in expanded granular sludge bed reactor, oxidation process and sedimentation process are carried out, and the waste liquid is decolorized. The content of Chinese gall is 0.9-11 times with respect to 35-45 %mass of aqueous sodium hydroxide. The content of deioniozed water is 1.5-3 times the weight of crude gallic acid.