The　bending　beam　to　simulate　the　load　of　0.2　0.4　stress　ratio　and　5%　NaCl　solution　jointly　function　proceed　chlorine　ion　erosion　test.　Test　results　show　that　the　same　depth　of　chlorine　ion　with　the　increase　of　soaking　time　and　stress　level　increases,　except　the　concrete　surface　layer.　Introducing　chloride　diffusion　coefficient　of　degradation　effects,　considering　the　effect　of　load　is　established　with　the　coefficient　of　load,　based　on　the　consideration　of　the　load,　chloride　ion　erosion　models　with　experimental　results　verify　the　new　model　and　the　contrast　experiment　measured　data　fitting　high　quality.　©　2011　IEEE.