This　paper　presents　an　integrated　investigation　of　deterioration　process　of　corroded　concrete　by　experiments　and　theoretical　model.　First　of　all,　the　porosities　of　concrete　samples　with　different　corrosion　periods　were　measured　by　the　mercury　intrusion　porosimetry　(MIP).　Then　the　distribution　of　sulfate　ions　in　the　concrete　was　measured　by　the　spectrophotometric　method.　Afterwards,　the　compressive　strength　were　measured.　The　results　indicated　that　the　porosity　and　the　compressive　strength　of　concrete　in　water　firstly　increased　and　then　progressively　stabilized　at　a　constant　value　due　to　the　hydration　of　cement.　However,　those　values　of　concrete　soaked　in　5wt.%　Na2SO4　solution　increased　and　then　decreased,　resulted　from　the　combination　of　cement　hydration　and　the　corrosion　of　sulfate　ions.　Moreover,　a　Stratified-Theoretical　calculation　model　was　established　with　the　input　parameters　of　corrosion　depth　of　sulfate　ion,　length　of　concrete　specimen,　strength　of　concrete　immersed　in　water　and　in　sulfate　solution.　At　last,　the　corrosion　resistance　coefficient　of　corrosion　layer　was　firstly　put　forward　to　evaluate　the　deterioration　process　of　concrete　with　high　effectiveness.