The　reinforced　concrete　column　after　corrosion　of　chloride　salt　was　subjected　to　magnesium　phosphate　cement　(MPC)-carbon　fiber　reinforced　plastics　(CFRP)　reinforcement　and　electrochemical　chloride　extraction　(ECE)　integration　experiment.　The　axial　compression　behavior　of　the　reinforced　concrete　column　was　tested,　and　then　the　numerical　analysis　was　carried　out.　Two　types　of　the　corroded　reinforced　concrete　columns　were　prepared　for　the　test.　The　columns　in　type　1　were　naturally　corroded,　and　the　columns　in　type　2　were　electrified　to　accelerate　the　corrosion　until　the　theoretical　mass　corrosion　rate　of　steel　bars　reached　15%.　Afterward,　the　MPC-CFRP　was　used　to　strengthen　the　corroded　reinforced　concrete　columns　and　to　remove　the　inside　chlorine　by　electrochemistry　method.　The　test　results　showed　that　the　ultimate　compressive　capacity　of　the　reinforced　concrete　columns　strengthened　by　the　MPC-CFRP　increased　by　more　than　22.63%.　However,　after　ECE　(current　density,　3　A/m(2)),　the　ultimate　compressive　capacity　of　the　reinforced　concrete　columns　strengthened　by　MPC-CFRP　reduced　by　3.07%　-　3.66%,　and　the　chloride　ion　content　at　the　interface　between　steel　bar　and　concrete　reduced　by　78.52%,　which　postponed　the　corrosion　of　the　steel　bars.　In　addition,　considering　the　complex　nonlinear　bond　slip　relationship　between　the　steel　bar　and　the　concrete　interface,　a　3D　mesoscopic　finite　element　plastic　damage　model　of　the　reinforced　concrete　columns　strengthened　by　the　MPC-CFRP　was　established.　The　numerical　results　were　in　good　agreement　with　the　test　results,　which　indicated　the　3D　mesoscopic　finite　element　numerical　model　can　predict　the　compressive　behavior　of　the　reinforced　concrete　columns　adequately.