The invention belongs to the technical field of metal casting and provides a metal casing device. The metal casting device is provided with a melting and casting chamber in which a crucible (13) and a casting mold (5) are arranged, wherein the melting and casting chamber (6) is in a structure capable of swinging at a certain angle under the action of a driving device; the crucible (13) and the casting mold (5) which are disposed in the melting and casting chamber (6) can swing at a certain angle along with the melting and casting chamber; molten metal flows into a storage chamber (19) of the casting mold from the crucible during swinging with the melting and casting chamber; and pressure gas is fed into the melting and casting chamber (6) through a gas inlet (25) in the center of a spindle so that the molten metal flown into the storage chamber of the casting mold is pressed into a cast molding cavity (10) of the casting mold to form casts. According to the metal casing device, parts do not move relatively in pouring process, so that damage to equipment due to arc striking in pouring process in the prior art can be avoided. Compared with the centrifugal pressure casting machine in the prior art, the metal casing device has the advantages of being simple in structure and small in size.