Forging method of high-strength heatproof magnesium alloy

The patent discloses a forging method of a high-strength heatproof magnesium alloy, specifically comprising the following steps of: preparing a blank material; heating the blank material and keeping warm; heating upper and lower flat anvils; carrying out multiple forging treatments on a hydraulic press with the cooperation of an intermediate annealing process; and carrying out aging treatment after forging. The forged magnesium alloy has advantages of uniform microstructure, fine crystal grains and excellent mechanical properties. After aging treatment, the tensile strength at normal temperature is greater than or equal to 450 MPa, the yield strength is greater than or equal to 410 MPa, and the elongation percentage is greater than or equal to 3%; at the temperature of 250 DEG C, the tensile strength is greater than or equal to 320 MPa and the elongation percentage is greater than or equal to 12%. By the adoption of the method provided by the invention, high temperature plasticity of the magnesium alloy is fully performed, and the service performance of the magnesium alloy is remarkably improved.