The goal of “carbon peaking and carbon neutrality” accelerates the development of renewable energy, and also places higher demands on industries to improve energy efficiency. On the other hand, the high proportion of renewable energy raises the operating costs of the power system, and expands the cross-subsidy to guarantee stable tariffs for residents and agriculture. To reasonably evacuate the increasing costs, a differential electricity tariff for the high-energy-consuming industry is designed in this paper. The total tariff cross-subsidy of residential and agricultural users is first calculated based on the average feed-in tariff and transmission and distribution tariffs by voltage levels. Then, a comprehensive energy consumption index (CECI) is designed to evaluate the energy consumption efficiency of each industry. Finally, the tariff increases for different high-energy-consuming industries are calculated according to the CECI of each industry, forming a differentiated apportionment of emission reduction costs for the power system.