An embodiment of the utility model provides a be used for full -bridge LLC resonant transformation ware protection circuit, it includes input source (Uin), L6599A chip, full -bridge bridging parallel operation (10), transformer (T1), resonant capacitor (Cr), transformer (T2), rectifier circuit (20), detect out the resonance current through transformer (T2), rectifier circuit (20), link to each other with 6 feet of L6599 chip, solved the function that the electric current protection can not be realized to full -bridge circuit and L6599 chip.