The invention discloses a liquid silicone rubber injection mold used for injection forming of a rubber edge structure at the side edge of a basal body. The liquid silicone rubber injection mold includes a front mold plate, a front mold core, a back mold plate, a back mold core and a pouring sleeve, and is characterized in that: the back mold core is provided with a basal body fixing groove, a rubber inlet groove communicated with the pouring sleeve, and a rubber overflow area; the basal body fixing groove is used for fixing the basal body, and a silicone rubber edge forming cavity is formed between the side edge of the basal body and the sidewall of the basal body fixing groove after the basal body is fixed and the mold is clamped; the rubber inlet groove is arranged along the sidewall of the basal body fixing groove; after mold clamping, a rubber inlet channel for communicating the rubber inlet groove and the silicone rubber edge forming cavity is formed between the top of the sidewall of the basal body fixing body and the front mold core; the rubber overflow area is arranged along one side, far away from the rubber edge forming cavity, of the rubber inlet groove, and is communicated with the rubber inlet groove through a rubber overflow channel; and the bottom of the rubber inlet channel is lower than the bottom of the rubber overflow channel. The liquid silicone rubber injection mold has the advantage of being good in injection effect and easy to control.