Since the environmental law established the concept of environmental information disclosure in 1989, China ’s environmental information disclosure has experienced over thirty years of the progress of practice and development. How to explain the internal logic of this policy change progress is the critical link to understand the policy development and then to actively adjust the policy. It is also necessary to enrich the theory of policy change in China and to make top-level design of information disclosure system.Based on this,the paper uses a case study method and takes theories of Advocacy Coalition Framework and Policy Learning as the analysis framework to analyze the path,dynamic factors and change logic of the environmental information disclosure policy. The result shows that the development of environmental information disclosure in China presents a process,from ‘implicit disclosure’to ‘semi public’,and then to ‘formal public ’ and ‘centralized public ’. From the perspective of policy,there are two interwoven paths between internal and external,jointly promoting the progress of environmental information disclosure policy. The external path reflects that the major events directly or passively promote the policy change; and the internal path reflects that the alliance seeking resources to maintain status and discourse power in politics,proceeds policy learning and progressively promotes the policy change. The process involves four interacting variables: major events,alliance resources,policy learning and policy beliefs,which explain the logic of policy change: the occurrence of external or focal events affect the original policy belief system,and thereby affect the initial structure and resources; then,the alliance uses the impact of external events to make strategic choices so as to strive for Alliance Resources and to conduct policy learning during the period,which leads to the emergence of new policy belief and thus promotes policy change. At present,the development of environmental information disclosure policy is passive,the social learning condition is immature,and the policy core belief has not yet reached a consensus. Therefore,the central government should take the initiative to reverse the external path,integrate fragmented resources between ministries and local governments,and promote social learning and the consensus of core belief. At the same time, non-governmental organizations should strengthen active policy learning, and fulfill the supervision responsibility of the implementation and practice of environmental information disclosure policy,so as to form the social norm of environmental information disclosure.