The Tripartite Thinking Method(TTM)contains two aspects: one divides into three, and three combines into  one. TTM is a universal scientific research methodology and  important  guanli (including management & administration, etc) philosophy. Many things have threeinone structures, the human have three factor thinking habit, which mean they usually divide a thing into three parts, take these parts into  consideration and  deal with the problems based on three factor consideration principle and threeinone combination principle. TTM is of great value in the management work, which should be researched and disseminatied. The combination of TTM and dichotomy may  become an important part of the Chinese School of Modern Guanli Science (CSMGS).