Abstract: Diversification of public crisis governance subject refers to the dynamic change process from a single government to diversity subject including the government, non-governmental organizations, corporate, the media and citizens. Diversification of public crisis governance subject depends on various subjects of public crisis governance working together to commit to prevent and eliminate public crisis. To achieve this process, we must strengthen the sense of participation and collaborative governance; enhance the ability to participate in and collaborative governance of all subjects, and perfect the external mechanism of diversification of public crisis governance subject.