The invention relates to a silicone rubber forming mold with a cold runner, comprising an upper mold and a lower mold fitting each other. A cavity is provided between the upper mold and the lower mold, the upper mold comprises an upper fixing plate, a cold runner plate and an upper mold plate that are stacked sequentially from top to bottom, the lower mold comprises a lower mold plate, the upper mold is internally provided with at least one injecting head for injection molding of a product and a cold nozzle module fitting the injecting head and used to cool the injecting head, a cooling runner for providing cooling liquid into the mold is arranged in the cold runner late, and the cooling runner is communicated with the cold nozzle module. The cold runner is designed in the traditional forming mold structure, the structure of the cold runner is further optimized, the length of the cold runner is shortened maximally, the problem that colloid consolidation in the processing process leads to starving of the tail end of the product is effectively avoided, defective rate is decreased, and capacity of a processing enterprise is improved.