The invention discloses a contact lens mold. The contact lens mold comprises an upper mold and a lower mold, wherein the bottom surface of the upper mold has a convex optical surface, a boundary convex surface, an opposite concave surface and an upper embedded surface symmetrical to a hypothetical center line from center to periphery in sequence; the distance from any point of the upper embedded surface to the hypothetical center line is D; the top surface of the lower mold has a concave optical surface, a boundary convex surface, a first opposite concave surface and a lower embedded surface symmetrical to the hypothetical center line from center to periphery in sequence; the distance from any point of the lower embedded surface to the hypothetical center line is d; when the upper and lower molds are not combined, D is greater than d; and when the upper and lower molds are combined, the upper embedded surface and the lower embedded surface are destructively clamped, so that the upper and lower molds can be stably combined to improve the contact lens production yield.