With　the　concept　of　＇Smart　City＇,　＇Internet　Plus＇　and　＇Smart　Grid＇　being　proposed,　the　shortage　of　traditional　power　supply　system　is　gradually　appearing.　Traditional　power　supply　system　is　difficult　to　organize　and　manage　in　batches.　Once　a　power　supply　malfunctions,　the　whole　power　supply　system　will　be　out　of　control.　This　paper　presents　a　smart　power　supply　system　based　on　distributed　parallel　module　power　supply.　This　system　is　composed　of　parallel　converter　module,　control　bus　and　controller.　It　can　smartly　adjust　the　number　of　enabled　modules　according　to　the　load　power　to　ensure　that　each　converter　module　is　working　in　the　optimal　efficiency　range.　In　this　paper,　CAN　bus　protocol　is　used　to　communicate　among　the　modules,　master-slave　current　sharing　model　is　used　to　realize　the　current　sharing　between　each　module;　Besides,　the　efficiency　of　the　converter　is　optimized　by　the　controller.　At　the　end,　the　simulation　using　software　has　been　developed　to　verify　the　feasibility　and　superiority　of　the　proposed　method.　©　2021　IEEE.