Through research on current topology control algorithms

aiming at energy consumption distribution uneven problem of WSNs node

propose an energy efficient topology control algorithm（EETCA） for wireless sensor networks（WSNs）.The algorithm can avoid partial nodes energy dissipation too fast and balance load of network effectively by taking residual energy of nodes

the size of cluster and the optimal transmission hop count of datas into account.Simulation results show that EETCA is prior to the original algorithm in energy consumption balance and prolong the lifecycle of WSNs.