Injection mold for improving optical axis concentricity of optical lens

The utility model discloses an injection mold capable of improving optical axis concentricity of an optical lens, and provides the following technical scheme aiming at the problem of low mold positioning precision: the injection mold comprises a movable mold plate and a fixed mold plate, at least two positioning columns are fixedly connected to a parting surface of the movable mold plate, at least two guide sleeves are fixedly connected to a parting surface of the fixed mold plate, and the positioning columns are fixedly connected to the parting surface of the fixed mold plate; a concave hole is formed in one end of the guide sleeve, a cylindrical boss extending towards the concave hole is fixedly connected to one end of the positioning column, and a very small fit clearance is formed between the outer cylindrical surface of the boss and the inner cylindrical surface of the concave hole. Through the extremely small fit clearance between the boss of the positioning column and the concave hole of the guide slee