The energy for the 220 kt/a ethylene plant in Dushanzi consists of fuel gas, fresh water, desalted water, circulating water, electricity consumption, high pressure steam, medium pressure steam, low pressure steam, nitrogen, plant air and instrument air. By changing the processing mode of raw materials, adopting advanced management experience, strengthening process management, providing special care for key equipment, optimizing key operating parameters and breaking down the energy consumption index into months, the ethylene plant can improve the output of target products, reduce energy consumption and ensure that the annual energy consumption meet the standard.