The　theory　of　the　different　extension-compression　elastic　modulus　was　adopted　to　establish　the　dynamic　nonlinear　FE　algorithm　for　the　concrete　bridge　deck　slab　of　different　elastic　modulus,　and　the　nonlinear　FE　program　was　compiled.　The　dynamic　mechanics　properties　and　the　time　history　analysis　of　the　Jinma　Bridge　were　carried　out　for　its　slab　of　girder　with　the　algorithm　proposed　in　the　paper,　which　can　be　the　reference　to　the　similar　structures　calculating.　Some　important　conclusions　are　obtained.