The invention discloses an injection mold with an air cooling device, and relates to the technical field of molds. The injection mold comprises a workbench, an air duct box is fixedly installed on the inner wall of the workbench, the air cooling device is arranged in the air duct box, the air cooling device comprises a cooling fan, the cooling fan is fixedly installed on a rotating shaft, and the rotating shaft is rotatably installed on a rotating rod; a knocking plate is fixedly installed on the outer wall of the rotating shaft, a fixing pipe is fixedly installed on the outer wall of the rotating rod, an arc-shaped sliding block is fixedly installed at the end, away from the rotating rod, of the fixing pipe, and the arc-shaped sliding block is installed on the outer wall of the semicircular sliding rail in a sliding mode. According to the injection mold with the air cooling device, the air cooling device is arranged on the air duct box, when a heat dissipation fan rotates to conduct air cooling heat dissipation, a fixing pipe can drive a rotating rod to conduct circumferential rotation, the rotating rod can drive the heat dissipation fan to swing, the air cooling range of the heat dissipation fan can be widened, and the heat dissipation efficiency is improved. And the air-cooling heat dissipation efficiency of the air duct box is further improved.