Objective To observe mierostrueture of synovial membrane of Zhitongjiangu decoction on knee osteoarthritis. Methods 72 rabbits were randomly divided into normal control group, model control group, Zhitongjiangu low dose group, Zhitongjiangu high dose group, each group with 18 rats in each, the preparation of rabbit model of KOA papain intraarticular injection of and model verification is successful, Zhitongjiangu low dose group, high dose group, to give the corresponding Zhitongjiangu recipe intragastric administration, and normal control group...