By using miniemulsion polymerization,a series of Styrene(St)/Butyl Acrylate(BA) latexes and Methyl Methacrylate(MMA)/Butyl Acrylate latexes were prepared.The properties of latexes and films were characterized and compared with that form conventional emulsion polymerization.The results indicated that some properties of polymer latex of miniemulsion were better than that of conventional emulsion,especially the stabality.