Abstract: During the WSN (wireless sensor networks) energy optimization process, this paper presents an algorithm based on hybrid mechanism. Divide the notes into the active ones and the non-active ones according to respective method. Combine the partial coverage algorithm and wake-up mechanism algorithms to build optimal coverage model, and then proceed to solve the optimal energy-saving programs. The method can take advantage of the different characteristics of nodes reduces complexity of the algorithm, to avoid unnecessary consumption of computing. Experiments show that:Mixed mechanism algorithm have reduced the energy consumption of active nodes and non-active node. And the single algorithm is compared with a significant effect. The network has been extended life cycle.