The　single-line-to-ground　(SLG)　fault　is　the　most　common　fault　in　distribution　networks.　The　output　current　of　cascaded　H-bridges　(CHBs)　can　be　controlled　flexibly　to　suppress　SLG　fault　current.　Therefore,　a　CHB-based　active　location　method　is　proposed　in　this　article,　which　integrates　the　functions　of　SLG　fault　arc　suppression,　fault　section　location,　and　fault　nature　judgment.　When　an　SLG　fault　occurs,　CHB　devices　quickly　inject　full　compensated　current　into　the　system　neutral　to　suppress　the　fault　current.　Then,　CHB　devices　are　regulated　to　reduce　the　injected　current,　and　the　variations　of　zero-sequence　voltage　and　zero-sequence　current　are　actively　constructed.　The　phase　characteristics　between　zero-sequence　voltage　variation　and　zero-sequence　current　variation　can　be　used　as　the　criteria　for　fault　section　location　and　fault　nature　judgment.　In　addition,　the　measurement　device,　namely,　the　retrofitted　feeder　terminal　unit　(FTU),　contains　signal　acquisition　module,　and　signal　calculation　module　is　designed,　which　can　collect　the　zero-sequence　signal　and　calculate　the　phase　difference.　Finally,　the　effectiveness　of　these　three　functions　and　the　fault-location　accuracy　of　the　proposed　method　have　been　verified　through　the　simulation　and　experimental　cases.