Under the guidance of Marxist theory, by applying theories of political science, ethnics and sociology, and on the basis of an in-depth analysis of the basic definition and features of integrity and political integrity as well as the factors that affect those integrities, the author elaborates the theory and practice of political integrity of the collective leadership of the Communist Party of China (CPC), analyzes the major manifestations, harmfulness and causes of the defect of political integrity in curr...