A new lead free piezoelectric ceramics of Bi0.5(Na0.825K0.175)0.5TiO3-Ba(TiyZr1-y)O3 (BNKT BZT) was prepared by conventional ceramic sintering method. The microstructure, surface topography, dielectric and piezoelectric properties were studied by X Ray diffraction (XRD) and the scanning electron microscope (SEM). The results showed that all the ceramics investigated could form a pure perovskite structure, the grain size were increased with the increase of x and y. The piezoelectricity was increased first then decreased with the increase of x and y. The piezoelectric constant and the dielectric constant of the ceramics were up to the maximum value of 157 pC/N and 1 510 respectively at x=0.05,y=0.2.