In this paper , O. 85PZN-0. 10BT-0. 05PT relaxor ferroeleetne ceranucs were prepared by two step method. The effect of technological processes (such as calcining and sintenng temperature) on the perovskite phase content and gram Slze of the speclmens was mvestlgated , and the dielectnc propertles and electrostrictive propertles of the ceramlCS were also studied. 1t was shown that with the increase of sintering temperature the content of perovskite phase mereased , but the increasmg of calcining temperature would decrease the stabilization of perovskite structure. With the optimized technological processes the pure perovskite phase structured ceramlcs were prepared successfully and their macro-propertles were also measured.