The imbalance of the node’s energy consumption dues to the difference of the sensing radius of node in wireless
sensor network. In view of this complex application environment, a distributed redundancy detection algorithm is proposed.The corresponding redundancy detection criteria is proposed, and the reasonableness of the criteria is analyzed. Under the condition of maintaining the coverage quality of original network, the algorithm can detect the redundant node more adequately. Simulation results show that, in the complex environment when the nodes have the same sensing radius, the algorithm activates less node for working, and the redundancy detection is integrated. When the nodes have different sensing radius, the algorithm detects the redundant node adequately and efficiently, so as to save lots of energy and prolong the lifetime of the network.