Abstract: Driven by the“Double Carbon”targets,renewable energy has experienced rapid development. However,the insufficient system peak shaving capability severely limits the integration of renewable energy. Therefore,the comprehensive market service mechanism of source and load and the two-layer unit combination model of demand response are proposed. The price demand response model with the objective function of minimizing the fluctuation of net load is established for the upper layer to the load side In the lower layer,the integrated market trading mechanism is built on the source side,which includes the auxiliary service of peak load regulation and the step-by-step carbon trading mechanism of carbon market. Finally,the original problem is transformed into a mixed integer linear programming problem,and the validity of the model is verified in different scenarios.