Abstract: Regional contingencies are becoming more frequent occurrences along with the advancement of China's regional economic integration. Collaborative governance becomes the inevitable choice of local government in one area. China's increasing emphasis on regional cooperation in response to emergencies, emphasizing the coordination of local government organizations within the region, but with little success. For the collaborative governance of regional contingencies, evolutionary process of decision among local government from the perspective of evolutionary game theory is discussed. The evolutionary game model considering fixed cost and social capital of decision between local governments is established. Behavioral evolutionary law and evolutionarily stable strategies are given. The sensitive to initial value in evolutionary paths of local government behavior is analyzed. The results show that the evolutionary paths of collaborative governance of regional contingencies are complicated. Evolutionary stable state depends on the initial status of the strategy and social capital and fixed costs of local government. The organizational behavior in regional emergent event cooperation governance is studied from the perspective of dynamic game. The conclusion of this study can provide guidance for the optimization ofcollaborative governance mechanism.

Key words: evolutionary game, regional contingencies, collaborative governance, social capital