The　BaTiO3/La0.7Sr0.3MnO3((BTO/LSMO)　bilayer　films　had　been　epitaxially　grown　on　(001)　oriented　LaAlO3　(LAO)　single　crystal　substrate　by　using　pulsed　laser　deposition　technique,.　The　measurements　of　electric　and　magnetic　properties　showed　that　the　bilayer　heterostructure　possessed　low　dielectric　constant　(epsilon(r)=263),　high　ferromagnetic　curie　temperature　(T-c=317K),　and　natural　ferromagnetic　and　ferroelectric　properties.　The　magnetoelectric　(ME)　voltage　coefficient　for　the　bilayer　heterostructures　at　room　temperature　was　around　140　mV/cm.Oe,　which　is　one　magnitude　order　higher　than　others.　The　interface　coupling　parameter　k　between　ferromagnetic　and　ferroelectric　layers　was　0.68.