Abstract: CUI Mingyuan was a famous Chinese medicine practitioner in Baoding in the 1950s, whose survival data in treating diseases were extremely rare. The contents of the newly discovered notes in CUI Mingyuan's medical records were compiled in order to introduce his clinical experience in diagnosis and treatment of exogenous diseases. CUI Mingyuan had made an in depth study of Yishui school academic thinking in traditional Chinese medicine, who was good at applying the experience of Yishui school in the diagnosis and treatment of exogenous diseases. He paid attention to the theory of medicine channel-tropism, used Sanfeng drugs to drive out the pathogenic factors, adjusted the body Qi and mechanism, and paid attention to clinical practice to get mutual regulation by using both Han and Wen. At the same time, he paid attention to protecting the Pi and Wei, attaching importance to Yangqi, and he had unique experience in the diagnosis and treatment of exogenous diseases.

Key words: internal medicine of traditional Chinese medicine, clinical experience, CUI Mingyuan, Yishui school