The invention relates to the technical field of injection molds, in particular to a mechanical injection mold with a cooling function. The mechanical injection mold comprises a box body, an upper mold, a shell, a base and lower molds, wherein the inner wall of the bottom end of the shell is in sliding connection with an ice crystal box, a steam generator is arranged on the ice crystal box, the inner wall of the top end of the shell is fixedly connected with a supporting plate, and the center of the bottom end of the supporting plate is fixedly connected with a motor; the tail end of a main shaft of the motor is fixedly connected with a fan, the two sides of the top end of the supporting plate are fixedly connected with mold guide posts, and the outer sides of the mold guide posts are in sliding connection with the lower molds; the upper mold is arranged over the lower molds, and the top end of the upper mold is fixedly connected with the box body; and the right end of the box body is fixedly connected with a water outlet pipe, the left end of the box body is fixedly connected with a water return pipe, and the bottom end of the left side of the shell is fixedly connected with a water delivery pipe. The mechanical injection mold is scientific and reasonable in structure, is more complete in cooling effect, energy-saving and environment-friendly, has enormous economic benefits andbroad market requirements and is worth popularizing.