Abstract:At present, the issues of population aging and pension service in China have already become the focus concerned by government, educational circles and society. The highlight of those issues covers a series of problems including supplydemand imbalance and unclear responsibility of the main body of supplies. Based on the concept of innovation, coordination, greenness, openness, sharing development put forward by the central government to enhance and innovate social governance, the paper puts forward organization management concept and ways in sharing economy and tries to combine it with cooperative governance theory so as to construct a multimainbody social pension governance mode with powerful resource integration capacity for demanders of social pension service. Under this governance mode, government should take rational strategies as follows: converting governance concept for clearly determining responsibilities of main bodies, constructing incentive and legal restraint mechanism, expanding multimainbody governance linkage sharing mechanism and strengthening coordination and supervision mechanism construction.