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