La-modified PbTiO3 Powders and ceramics were prepared by coprecipitation and salt decomposition method. In this process, fine and homogeneous single phase of La-modified PbTiO3 was synthesized at lower temperature than oxide mixing method. And these powders contributed to lowering calcination temperature and rising sintering properties. The properties of these powders and the change of properties with themperature and the effect of powder properties on sintering were investigated.