历经2000多年产生和发展历程,中医方剂发生了诸多演变。本文对方剂的演变规律、演变动力、演变本质进行了论述,提出了方剂尤其是经典方剂的推演,对于灵活运用方剂、扩大方剂的使用范围、创制新方等具有重要的理论和实践意义。 After 2000 years of generation and development process, TCM prescription has undergone many evolutions. In this paper, the evolvement rule, evolving power and evolving essence of prescriptions are discussed. The deduction of prescriptions, especially classical prescriptions, is put forward. It has important theoretical and practical significance for the flexible application of prescriptions, expanding the scope of prescriptions and creating new parties.