Cooling mechanism for ultra-large die-casting die

The utility model relates to the field of die-casting dies, in particular to a cooling mechanism for an ultra-large die-casting die, which comprises a sprue bush, a sprue spreader is movably connected to an inner cavity of the sprue bush, a sprue spreader cooling column is movably connected to one side of the sprue spreader, and a fixing block is fixedly connected to the top of the sprue bush. A first cooling cavity is formed in the sprue bush, a first liquid inlet pipe is arranged on the left side of the bottom of the sprue bush, and a first liquid outlet pipe is arranged at the position, located on the right side of the first liquid inlet pipe, of the bottom of the sprue bush. The first liquid inlet pipe is arranged and used for injecting cooling liquid into the inner cavity of the first cooling cavity, the cooling liquid flows out through the first liquid outlet pipe after flowing in the cooling cavity, so that the surface temperature of the sprue bush is reduced, the sprue spreader cooling column is arran