The precursor was synthesized by microwave method with six cobalt nitrate (Co(NO3)2?(6H2O) and benzoyl acetone (C10H10O2) as raw materials. The precursor is calcined at 500 ℃ in air are obtained under the conditions of amorphous Co3O4 flower.The microstructure and surface morphology of the amorphous Co3O4 flower were studied by XRD、SEM and TEM.The electrochemical test results show that the initial charge specific capacity of the amorphous Co3O4 flower anode material is 816mAh / g at a current density of 100mA / g. After 100 cycles of circulation, the capacity retention rate is 89.2%, with high specific capacity and good cycle performance and a wide range of application prospects.