ABSTRACT
Based on the theory of “chuanshe”， this paper expounded the role of yang deficiency and toxic knot as the core pathogenesis in various aspects of gastric cancer recurrence and metastasis after surgery， and put forward the prevention and treatment ideas of recurrence and metastasis of gastric cancer by conjugating yang to curb the trend of “transmission （chuan）”， protecting the yang to prevent metastasis by settling its “residence （she）”， preventing immersion by warming the yang to block the way of “chuan-she”， and attacking and cutting to clear the pathogen of cancer and poison and eliminate the root of the disease. In the process of preventing and treating recurrence and metastasis after gastric cancer surgery， the three methods of conjugating yang， protecting yang and warming yang should be flexibly used based on the principle of treating yang； combined with attacking and removing cancer poison， differentiating syndromes and diseases ； meanwhile， the changes of cold and heat in the body should be identified in detail and treated by the syndromes， in order to provide reference for the clinical differentiation and treatment of recurrence and metastasis after gastric cancer accurately.