In this paper, the phase structure, microstructure, dielectric properties and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.09Ti0.91-2xSnxGex)O3 lead-free piezoelectric ceramics doped with different amounts of Sn and Ge were studied by the traditional solid-state reaction method. The results show that the crystal is still a single perovskite structure after doping Sn and Ge, and there is no obvious second phase, but the doping causes the change of the internal lattice of the crystal. With the increase of Sn and Ge doping amount, the piezoelectric constant and the electromechanical coupling coefficient show a trend of increasing first and then decreasing. When the doping mass ratio of Sn and Ge is that x=0.032, the highest curie temperature of the system is 122 ℃.