Aiming　at　the　rust　removal　requirements　of　reinforced　concrete,　the　MPC-CFRP　composite　material　was　used　as　the　external　anode,　and　the　Electrochemical　chloride　extraction　(ECE)　method　was　used　to　test　the　polarization　curve　of　the　steel　bar　under　different　ECE　current　densities,　and　the　potential　changes　of　the　steel　bar　at　different　times　were　analyzed.　The　results　show　that　the　ECE　system　with　MPC-CFRP　as　the　external　anode　has　a　good　effect　of　reducing　the　corrosion　rate　and　the　risk　of　corrosion　of　steel　bars.　The　current　density　of　3A/m(2)　is　higher　than　that　of　1A/m(2)　in　dechlorination　efficiency.　After　28　days　of　ECE,　the　current　density　of　1A/m(2)　and　3A/m(2)　can　re　passivate　the　reinforcement.