Recently, energy saving has become a hot issue in application of WSN. To solve this problem effectively, this paper proposes an improved LEACH route protocol based on Symbolic Aggregate Approximation (SAX). We firstly improve the selection method of cluster heads (CH) in LEACH so that the distribution of CH is more reasonable and the energy consumption is more balanced. Then we compress the sent data by using SAX in the stage of transmitting data so that the energy saving is reduced more. The simulation results show that, compared with other existing fusion algorithm, the proposed scheme saves energy effectively while ensuring the accuracy of reconstruction.