Forward　bias　voltage　is　utilized　to　regulate　ion　migration　in　perovskite　solar　cells（PSCs），thereby　preventing　the　accumulation　of　perovskite　ions　at　the　interface，passivating　defects，and　restoring　the　performance　of　aged　PSCs.　The　power　conversion　efficiency（PCE）of　the　aged　PSCs　is　restored　from　17.8%　to　21.5%　by　implementing　the　forward　bias　voltage　repair　method.　Introducing　the　bias　voltage　repair　method　in　the　maximum　power　point　tracking　for　100　hours　yielded　a　total　energy　gain　of　3.1%.　An　independently　constructed　integrated　characterization　environment　was　used　to　measure　the　real-　time　changes　in　the　electrical　and　optical　characteristics　of　PSCs　before　and　after　the　repair　process　using　bias　voltage.　Furthermore，a　physical　model　was　developed　to　investigate　the　mechanism　behind　the　repair　process，specifically　focusing　on　the　regulation　of　perovskite　ion　migration　by　bias　voltage.　The　results　demonstrate　that　the　repairing　strategy　can　control　ion　migration，passivate　defects，optimize　carrier　extraction　and　transport，and　ultimately　repair　the　PSCs.　©　2024　Science　Press.　All　rights　reserved.