The clean heating industry is still in the process of transformation to market - oriented operation, and the investment and operation of electric heating rely on subsidies. Therefore, it isnecessary to study the economic issues of electric heating projects.The economic analysis model and the load aggregation management model of the regenerative electric heating heat source station are built, and the economic benefits of the electric heating heat source station before and after the aggregation management participating in the auxiliary service are compared. The results show that aggregating the electric heating loads with flexible regulation potential to participate in the auxiliary service market can obtain the aggregation income, reduce the electricity cost of heat source stations, enhance the economy of the entire electric heating project.The result has important implications to promote the development of marketization of electric heating.