Along with the advancement of social modernization in China，the social risk also increase，the uncertainties related to the operation of the social instability is more outstanding. How to deal with public emergencies concerns the fundamental interests of people and the overall situation of social stability. It has also become a major practical issue that tests the wisdom of party committee and goverments at all levels and maintains the credibility and discourse power of governments. During major social and public crises，such as SARS in 2003，the “721” torrential rain in 2012 and COVID-19 in 2019，Beijing has formed a pluralistic social governance pattern led by the party committee and the government，coordinated by society and participated by the public，among which，voluntary service plays an increasingly prominent role in social and public crises. Through the basic concept of psychosocial volunteer service，this research explores the present situation of social psychological volunteer service in Beijing，and proposes “Beijing Psychosocial Volunteer Service Cooperation Mechanism” to solve the difficulties encountered by psychosocial volunteering service in Beijing，so as to provide multiple perspectives for social organizations to participate in social governance and innovate the cooperation mechanism of volunteers.