Public crisis management is a systematic project, among which the ideological and political education is an important part of crisis management system, and plays a unique role in handling crisis and early warning. Based on the functions of the ideological and political education, i. e. warning function, prediction function, direction function and treatment function, this paper analyzes and discusses its instructional role and operation practice in public crisis management, so as to establish the work mechanism of the ideological and political education in the crisis management system.