Abstract: The inspection system of the Communist Party of China in the period of democratic revolution was designed and operated by the Party according to the objective historical conditions and the practical needs of the main tasks in different stages, and constantly adjusted in the process of practice, involving a series of working rules and action rules such as organizational structure, personnel selection, duty performance, working methods and discipline requirements. It was influenced by many factors such as the revolutionary war environment, with the characteristics of revolution, wartime and mobilization.