In order to control the quality of Codonopsis tangshen roots of the traditional Chinese medicine during processing in the production area,this paper studies the initial processing parameters by examining factors such as processing method,temperature,water loss,kneading frequency,and medicinal grade,also uses a one test multiple evaluation method to determine the content of effective ingredients in the samples related to the initial processing of C. tangshen roots,and formulates the preliminary processing technology of C. tangshen roots.The initial processing technology involves washing,removing mud,draining,and heating.In the first stage,the medicinal material is taken out,classified according to different levels at a temperature of 80 ℃ and the water loss of 60%,and kneaded seven times.The material is then placed on a plate and heated.In the second stage,the medicinal material is baked at a temperature of 60 ℃ until it turns yellow white,with wrinkles and a tight texture.It is then taken out and packaged in bundles of 500 g or 1 000 g,and stored under vacuum and plastic sealing.