Based on a prefabricated residential project in Beijing,this paper divided the construction site into 5 differ-ent construction stages by collecting monthly electricity bill data and combining with the actual construction progress,analyzed the time span and power consumption characteristics of different construction stages,and gave the correspond-ing power consumption intensity.The electricity consumption in construction area,office area and living area were measured during the construction of underground and above-ground main structure,and the characteristics of electricity consumption in 3 areas were analyzed.Finally,this paper put forward some management suggestions from the perspec-tive of saving construction electricity.