The high complexity and uncertainty of risk society bring great challenges to social governance. As an important tool to achieve the goals of social governance, the key to effective implementation of public policy is whether the target group (the public) 's attitude towards the policy and the actions taken can be consistent with the policy requirements. The research finds that the public's policy compliance behavior directly depends on their attitude toward the policy, and the public's cognition and evaluation of the policy run through the whole policy process, and the evaluation is based on whether all aspects of the policy process can meet their needs to resist risks. Therefore, the perspective of the whole policy process can explain the influencing factors and formation mechanism of people's policy compliance in a more comprehensive way. In a risk society, the public policy compliance mechanism is formed by the integration of efficiency and value, as well as the integration of external forces and internal forces. Based on the analysis framework of "policy -- attitude -- behavior" and the constituent elements of this mechanism, an auxiliary mechanism is established to enable the policy process, risk cognition, policy identification, external environment and other components to form a more smooth and benign interaction. So as to further optimize the policy compliance mechanism.