Abstract:In this paper, the operation mode and cooperation mechanism of PPP financing, and the application of PPP financing model in land reclamation projects in coal mine subsidence have been introduced. Based on risk-benefit equilibrium principle, from the aspects of private capital and government risk, the optimal risk sharing model with minimum total cost has been established. Under the conditon of knowing constant risk sharing coefficient, the Shapley value model has been established to distribute the benefits. It is showed that the comprehensive risk coefficient of private investors is slightly larger. Thus, the risk should be shared by both sides. Private investors bear most of the project capital investment, and the profit is slightly larger than that of the government. The introduction of PPP model for coal mining subsidence land reclamation can solve the fund pressure, reduce financial abd market risk of the projects for the government. For private investment subject, it can avoid too much policy and uncertainty risk, and obtain higher investment income. This study will provides a theoretical basis for the PPP financing negotiation of land reclamation projects in the coal mining subsidence. It has a very important practical significance for accelerating the reclamation process in the subsidence area.