Metal casting cutting device capable of conveniently clamping casting part

The utility model relates to the technical field of metal casting, and discloses a metal casting cutting device convenient for clamping casting parts, which comprises a working table, a driving device is arranged at the top of the working table, a placing and clamping device is arranged on the side surface of the driving device, a cutting device is arranged at the top of the working table, and the cutting device is arranged on the top of the working table. The placing and clamping device comprises a supporting frame, a placing frame, a placing groove, a fixing frame, a moving groove, an air box, an air pump, a connecting pipe, a sealing sliding plate, a connecting frame, an extrusion plate and an anti-skid cushion layer. When the metal casting cutting device capable of conveniently clamping the casting part is used, after the casting part is placed in a placing groove, an air pump is started to convey air in an air box into a fixing frame through a connecting pipe, a sealing sliding plate can be pushed to mov