The Lead free piezoelectric ceramics (0.8-x)Bi0.5Na0.5TiO3-0.2Bi0.5K0.5TiO3-xBi(Zn2/3Nb1/3)O3 (mole fraction 0≤x≤0.06) (0.8-x)BNT-0.2BKT-xBZN) were prepared by the conventional ceramic sintering technique. The microstructures, surface topography, dielectric properties and piezoelectric properties of these piezoelectric ceramics were studied by XRD and SEM. The X ray diffraction analysis showed that all the samples became the typical perovskite structure; From the result of SEM, 〖HJ*4/9〗at the same sintering temperature, as the amounts of Bi(Zn2/3Nb1/3)O3 increase, it promotes the growth of crystalline grains; in the condition of sintering temperature of 1 180 ℃ and 2 h heat preservation, when the x=0.02, the (0.8-x)BNT 0.2BKT xBZN ceramic get its piezoelectric and dielectric property with the piezoelectric constant d33=48 pC/N, dielectric constant εT33/ε0 = 598.9 and the dielectric loss tan δ= 0.048 45.