O. 75Pb (Znl/sNb2/s)Os-O. 15BaTiOs-0. 10PbTiOs ceramlCS were prepared by columbite method and the effect of molding pressure change on dielectnc and electrostrictive propertles was mvestlgated. The results demonstrated: with the increase of molding pressure , the denslty and crystal gram Slze of the ceramlCS were mcreased, and the dielectnc and electrostrictive propertles were also lmproved.