Electric heating projects are important objects of power demand side management, which are conducive to improving atmospheric environment and promoting new energy power consumption. Economy is the decisive factor to promote construction of electric heating projects. In order to promote the healthy development of electric heating in China, the analysis model of critical tariff was created. The reasonable model boundary conditions were determined by investigation. Economy of centralized electric heating projects such as regenerative electric boiler projects, centralized air source heat pump projects, ground source （water source） heat pump projects in Beijing under catalogue tariff settlement method and unchangeable difference of purchase and sale price settlement method was studied. Based on the results of calculation and analysis, policy recommendations for promoting the construction of electric heating projects was put forward.