The utility model discloses a demolding mechanism for an injection mold of an automobile combination lamp reflector. The die comprises a lower die plate and a lower die core used for forming the leftside face, the front side face and the rear side face of a product. A first inverted buckle is arranged on the left side surface of the product; a first included angle is formed between the first inverted buckle and the horizontal plane; the die further comprises a first die core used for forming the first inverted buckle. A first open groove is formed in the left end of the lower die plate. The first open slot is positioned on the left side of the lower die core; the demolding mechanism for the injection mold of the reflector of the automobile combination lamp, provided by the utility model,has the advantages that the demolding can be smoothly carried out, the product cannot be damaged by pulling, the structure is simple, and the installation is convenient.