Abstract: A manufacture method for a magnesium alloy product includes steps of: providing a mold comprising a upper mold and a lower mold, the upper mold having a punch, the lower mold having a cavity, the punch being adapted to be accommodated in the cavity; heating the mold so as to increase the temperature of the cavity to a determined degree; placing a magnesium alloy billet in the heated cavity; and compressing the upper and lower molds so as to drive the punch to deform the magnesium alloy billet to a magnesium alloy product having a shape corresponding to the cavity. The punch in the cavity and an inner wall of the cavity are configured to have a gap of 0.05 mm˜0.1 mm.