Alternating Current Light Emitting Diode(AC-LED)works in declined efficiency and with high harmonic content and flickers when it is directly linked with the commercial power. This paper puts forward an AC-LED driver power supply, which uses fewer elements and can be easily controlled by adopting a bridgeless structure of single-stage totem poles with the driving strategy of high frequency square wave. Theory analysis and experiments have shown: within the 10% fluctuation of input voltage and with the driver power supply put forward in the paper, AC-LED works in the efficiency of more than 90%, with power factor above 0.95 and no flicker.