The effects of the synthetic temperature and sintering technique on the structure and piezoelectric properties of [Bi0.5(Na1-x-yKxAgy)0.5]0.94-Ba0.06TiO3 system lead free piezoelectric ceramics were studied by XRD,SEM and other analytic methods.The effects of polarization technique on the piezoelectric property had also been studied.It showed that appropriately increasing the synthetic temperature was helpful in the formation of main crystal phase,and properly prolonging holding time was helpful for increasing the piezoelectric properties of the ceramics. Enhancing polarization electric field and the polarization temperature and extending the polarization time could also help to improve the piezoelectric properties. But if the polarization temperature was too high, the piezoelectric properties became worse because of the depolarization at high temperature.