The invention relates to the technical field of moulds, in particular to a silicone rubber mould. The silicone rubber mould comprises a supporting mechanism, a lower mould mechanism, a sliding plate,an upper mould mechanism, a material receiving mechanism, an ejection mechanism, a blocking mechanism, a hydraulic rod and a water tank. According to the silicone rubber mould, automatic sealing of aliquid separation groove can be realized, a blockage block and a liquid hole are parallel and level, and unlevel molding parts can be avoided; when injection molding is completed, a handle can be heldand rotated upwards, a lower template is driven to rotate upward through a supporting rod, so that the molding parts rapidly drop, discharging is more convenient and rapid, the molding parts can be ejected through the ejection mechanism, and the molding parts are prevented from being attached to the inner wall of a cavity; and cold water is always maintained in a plastic mat, workpieces with materials dropping can be buffered, so that the molding parts drop and are damaged, and the plastic mat can cool the molding parts, so that the molding effect is better.