The utility model discloses a non -contact power supply unit suitable for electric automobile, including DC power supply (i) U (i) H, fully controlled bridge formula converter, non -contact transformer, vice limit converter, filter circuit, BOOST boost circuit, the thrown cut device that charges, vehicle -mounted storage battery (i) U (i) bat, former edge domination ware and vice edge domination ware. Forward transmission status, commercial power obtain the direct current through the power factor correction circuit, charge to vehicle -mounted storage battery, and solar cell also charges to vehicle -mounted storage battery, reverse transmission status, solar cell returns the power supply ability to the mains side, has both saved the cost, has reduced volume and weight again. Use limit ring theory or poincar cross -section and judge whether the switch tube S1~S6 of fully controlled bridge formula converter works at soft on off state under forward power supply mode. At sleet weather, do not need the plug, the security performance is better. Use three non -contact transformer under the forward charge mode, transmission power's scope is bigger, the utility model discloses the optimum of efficiency can exceed 94%.