The onset of digestive tract tumor is hidden and has a high incidence. Chemotherapy is the first choice, and its accompany.ing side effects seriously affect the normal life of patients. The author gives full play to the specialty of Traditional Chinese Medicine(TCM) syndrome differentiation, comprehensively evaluates the internal causes and overall situation of tumor and chemotherapy injury,adjusts the direction of medication, and improves the adverse reactions after chemotherapy with tonic method. This paper summarizedthe clinical dialectical thinking and medication characteristics to benefit colleagues.