Understand the nature and characteristics of traditional Chinese medicine wastewater treatment methods used to understand the nature and characteristics of traditional Chinese medicine wastewater treatment methods used to illustrate Chinese medicine wastewater pollution mainly for high concentrations of organic wastewater pollution for the pharmaceutical industry, due to the different drug production process Due to the different drug varieties and production processes, the quality of wastewater and the amount of water produced are quite different. Due to the short product replacement period, the quality and quantity of wastewater are constantly fluctuated and unstable due to product replacement. Chinese medicine wastewater mainly from the production workshop, in the brewing cooking herbs, washing, preparation and other processes generated. The waste water includes the raw water of the washing process in the production process, the residual liquid of the original medicine juice, the sewage generated in the unit operations of filtration, distillation and extraction, the washing of the production equipment and the flushing of the floor. The main pollutants are the various ingredients fried from herbs, the main components are: sugar, wake up, lignin, alkaloids, proteins, pigments and their hydrolyzate. The characteristics of Chinese medicine wastewater are: high concentration of organic pollutants; suspended solids, especially lignin and other light weight, difficult to precipitate high organic content; high chroma; wastewater biodegradability is good; Sewage composition is complex, water quality changes greatly. The above characteristics of Chinese medicine wastewater make it difficult to handle. The reports on Chinese medicine wastewater treatment technology are rare at home and abroad. According to the reports that have been reported, the existing treatment methods of traditional Chinese medicine wastewater still follow the treatment methods of commonly used pharmaceutical wastewater, namely: physico-chemical law, biological law and materialization Biological method. According to the different quality of Chinese medicine wastewater, the physical and chemical methods used are: coagulation, adsorption, electrolysis, flotation and so on. (1) coagulation method coagulation method is commonly used in pharmaceutical wastewater treatment method, by adding coagulant to reduce the concentration of pollutants to improve the biodegradability of wastewater. Common coagulants are polyferric sulfate, ferric chloride, ferrous salts, polyaluminum chloride, polyaluminum chloride, polyacrylic acid amine (PAM), coagulation method has a wide range of applications in pharmaceutical wastewater, in the traditional Chinese medicine Wastewater is also used. (2) adsorption method Adsorption method is the use of porous solid phase material adsorption of one or several pollutants in wastewater to achieve the purpose of wastewater purification. Pharmaceutical wastewater treatment, commonly used dry ash or activated carbon treatment of vitamins, diclofenac, proprietary Chinese medicine and other wastewater generated in the production. Affected by the particle size, surface and structure of the adsorbent, the COD removal rate of the adsorbed wastewater is generally 20% -40%, and the removal rate of chroma can reach about 80%. (3) Flotation flotation method is also commonly used in pharmaceutical wastewater treatment processes, including inflatable flotation, dissolved air flotation, chemical flotation and electrolysis flotation and other forms. Which chemical flotation more applications, the use of suspended solids in the wastewater pretreatment. After the traditional Chinese medicine wastewater is treated by chemical flotation, the removal rate of COD can reach 50% and the removal rate of solid suspended matter reaches more than 80%. Although the flotation method with less investment, low energy consumption, simple process, easy maintenance, but can not effectively remove soluble organic matter in wastewater, need to be further processed by other means. In addition to the physical and chemical laws, but also reverse osmosis, stripping method, electrolysis and other pharmaceutical wastewater treatment. These physicochemical methods can remove part of COD, BOD, SS, NH3 - N and improve the physical and chemical properties of wastewater, often as a pretreatment process for biological treatment.