In order to solve the problems of LEACH(Low Energy Adaptive Clustering Hierarchy)nodes shortife cycle and consumption imbalance，the paper proposes an improved algorithm of LEACH. The main idea of themproved algorithm is to consider the current position and the current energy of the node，which can be more evenlydistributed cluster head，to prolong the life cycle of the node. A comparison is made of LEACH protocol with NEW一LEACH protocol. Simulation result shows that the improved protocol increases by 40.7% in survival time and thereceived data but reduces node’s energy consumption.