Die-casting die for gearbox shell

The utility model relates to the technical field of gearbox shell die-casting, and discloses a gearbox shell die-casting die which comprises a box body, a rotating shaft is arranged in the box body, a main shaft is movably connected to the surface of the rotating shaft, and connecting shafts are movably connected to the positions, on the two sides of the main shaft, of the surface of the rotating shaft. And a limiting mechanism is fixedly connected to the position, located above the connecting shaft, in the box body, a movable seat is fixedly connected to the end, away from the rotating shaft, of the connecting shaft, a base plate is arranged on the side, away from the connecting shaft, of the movable seat, and an upper seat plate is arranged below the main shaft. The main shaft moves downwards and drives the upper seat plate to not rotate and move downwards after being driven by the bearing, and the connecting shaft is opposite to the main shaft and the rotating shaft in connecting and meshing directions, so