Strengthening public participation in grassroots social safety governance is an important means to improve the social governance system and enhance the capability of social governance. To further optimize the path of public participation in grassroots social safety governance, this paper takes the current situation of public participation in Hangzhou’s “Million Volunteers Police” as a starting point, identifies the restrictive issues such as the incomplete main body factors, insufficient cultural factors, imperfect system factors, inappropriate resource allocation factors, and not in-depth strategic factors, and puts forward countermeasures and suggestions for training governance subjects, constructing governance systems, and deeply cultivating governance culture, in order to improve the efficiency of public participation in grassroots social safety governance.