Abstract: Effective participation of social forces is a key issue in the emergency management of public security crises.There still exist different types of low efficient,non-effect and negative effect participation failure when different social subjects such as non-governmental organization,profit organization，media and the public participate in the emergency management of public security crises.The cause of it is mainly the long-term and excessive government space-occupying,limited participation subjects collaboration,poor communication network and indeterminacy of incentive and restraint emergency system.Correcting the failure of social participation，we may begin from the mechanism construction which including strengthening the linkage and cooperation，enhancing the information sharing,improving the education and training and perfecting the incentive and restraint system.

Key words: public security crises, participation of society, the failure of participation, emergency, correction