Abstract: Tensile property,conical cup value(CCV) and hole expansion performance of AZ31 magnesium alloy sheet were investigated in the temperature between 20℃ and 300℃.The experimental results indicated that,with an increase of the experimental temperature,the tensile strength decreased and elongation increased greatly,the conical cup value(CCV) decreased and hole expansion formability was significantly improved.A minimum CCV acquired at 300℃,indicating,a good drawing-bulging properties was acquired at this temperature.