Based on LEACH and PEGASIS algorithm,this paper proposes an assistant cluster head algorithm in Wireless Sensor Networks(WSN).It according to geographical location of the cluster head node,residual energy and the number of cluster member nodes,determines whether production assistant in the cluster head and cluster head needs to generate assistant,and chooses the right node cluster to reduce the energy consumption of cluster head communication.Assistant in PEGASIS adding cluster head,the improved assistant cluster head algorithm's performance...