A　multi-level　selective　protection　control　technology　based　on　CAN　bus　communication　for　low-voltage　distribution　system　is　proposed　to　ensure　the　rapidity　and　global　selectivity　of　short-circuit　fault　protection.　Based　on　the　early　detection　technology　of　short-circuit　fault　and　fast　breaking　technology　of　short-circuit　current,　the　isolated　protection　apparatus　and　controllers　at　different　levels　are　combined　by　CAN　bus　communication　technology　to　form　a　selective　protection　control　system.　At　the　same　time,　combined　with　the　technical　characteristics　of　CAN　bus　and　the　performance　requirements　of　selective　protection,　the　communication　mechanism　of　multi-level　selective　protection　is　established.　The　selective　protection　bus　technology　is　applied　to　the　three-level　low-voltage　distribution　experimental　system　to　complete　the　verification　experiment　of　multi-level　selective　short-circuit　current　fast　breaking.　The　results　show　that　the　selective　protection　control　technology　based　on　CAN　bus　communication　is　able　to　balance　the　rapidity　and　the　global　selectivity　of　short-circuit　fault　protection.　©　2022,　The　Author(s),　under　exclusive　license　to　Springer　Nature　Singapore　Pte　Ltd.