Metal shell forming method and device

The invention discloses a metal shell forming method and device, wherein a metal shell high-pressure forming method comprises the following steps: locating a metal plate in a die including an upper die, a lower die and a die core, and locating the metal plate on the die core; heating the die by a heating device to heat the metal plate; and applying high-pressure gas in multi-level mode to the metal plate so as to drive the metal plate to be pressed on a surface of the die core and form the metal shell. On the other hand of the invention, a metal shell high-pressure forming device particularly comprises the heating device combined with an external surface of the die and used for heating the die and the metal plate, a high-pressure gas supply unit for applying the high-pressure gas to the metal plate, and a digital control unit for controlling the high-pressure gas supply unit in digital form to apply the high-pressure gas to the metal plate in multi-level mode to form the metal shell.