Energy problem has always been bottleneck of development of wireless sensor networks（ WSNs）.Clustering algorithm can work well to reduce energy consumption of network communication. Analyze various existing clustering algorithms

and on the basis of LEACH

improves method of choosing cluster heads. Discuss numbers choosing of cluster heads

and then take sensor density inside network as reference to choose cluster head

by giving different parameters to compare effect of node density on protocol operation. Simulation results indicates that the improved algorithm effectively lowers communication energy consumption

prolongs network lifetime.