The citizen participation is an important issue in public crisis management.Social capital is an important theory which can analyze the development of the social.It has an explanatory power to the citizen participation.We analyze the content and concepts of Citizen Participation,Public Crisis Management and the Social Capital.We discuss the value of the citizen participation in public crisis management.With the lack of social capital and its negative externalities,we research the dilemma of the citizen participation.At the last,we discuss the way to improve the citizen participation though dis...