Abstract:Some existing problems of wirless sensor network routing protocol are briefly analyzed in the paper firstly,which indicates some advantages and disadvantages. Based on the work done above,the essay proposes a LEACH protocol improved algorithm based on dead-reckoning method. Numbers of data received in DR-LEACH, it has proposed based on dead-reckoning method,and energy consumption can be reduced. Through computation and simulation used NS2,period of network life is extended and the precision of data can’t be affected in DR-LEACH algorithm,effectively demonstrated the feasibility of the algorithm