The role of traditional Chinese medicine（TCM） in tumor prevention and treatment is increasingly prominent. The breakthrough of clinical efficacy needs continuous innovation in theory. Guided by the TCM pathoge-nesis syndrome differentiation

this paper analyzes the syndrome differentiation and treatment system of TCM cancer pathogenesis from pathological factors

disease location and disease nature

and further expounds the basic steps of the TCM syndrome differentiation and treatment system of cancer

including identifying the basic pathological factors

identifying the specific disease location

establishing the treatment principles and methods and selecting prescriptions and drugs in order to enrich and improve the theoretical system of tumour on TCM and to provide guidance for the clinical diagnosis and treatment of tumor in TCM.