In this paper, high performance 0.07Pb(Sc1/2Nb1/2)O3-0.93Pb(Hf0.47Ti0.53)O3(PSN-PHT) ceramics were successfully synthesized by solid state reaction method, and the improvement of PSN-PHT ceramic properties by MnO2 doped was comprehensively analyzed from the aspects of microstructure, phase structure and electrical properties. The experimental results show that the addition of MnO2 changes the phase structure of PSN-PHT ceramics, reduces the content of ferroelectric tetragonal phase, and leads to the appearance of crystalline phase boundary (MPB). At the same time, the addition of MnO2 can increase the grain size and homogenize the grain. When the doping amount of MnO2 is 0.8 mol%, the sample achieves the best performance, and its d33、kp、TC、Qm and tanδ were 450 pC/N, 0.65, 348 ℃, 1 200 and 0.003 2 respectively. In particular, the temperature stability of PSN-PHT-0.8Mn samples is much higher than that of commercial PZT-5 and PZT-8 ceramics. It has a great application prospect in the field of piezoelectric ceramic transducers.