Injection mold with double ejection function and injection molding method thereof

The invention discloses an injection mold with a double ejection function. The injection mold comprises an upper mold and a lower mold, wherein the lower mold comprises a lower mold body, a lower moldbase plate, a movable part and a plurality of ejector pins, the lower mold body is provided with a concave part used for forming a product, the ejector pins are used for ejecting the product, the lower mold body is provided with a stretching block capable of protruding out of the end part of the lower mold body, the movable part is provided with a push rod, when the part, protruding out of the end part of the lower mold body, of the stretching block is pushed by the push rod, the lower mold body can move, a convex block is arranged at the end part of the lower mold base plate, the convex block and the stretching block are provided with a first inclined surface and a second inclined surface respectively, when the stretching block rises relative to the convex block, the first inclined surface abuts against the seco