The invention discloses a screw protection cap of a sleeve. The screw protection cap comprises a screw protector body, an inner thread, a friction reduction belt, a skid resistance belt and a horizontal stripe, wherein the inner thread is arranged inside the screw protector body and is connected with a thread of the sleeve in a matching way, the friction reduction belt is formed by improving the inner diameter of the protector body and removing a local thread, the skid resistant belt is arranged at an adjacent place of the friction reduction belt and the horizontal stripe is axially arranged on the periphery of the skid resistance belt along the screw protector body. The screw protection cap of the sleeve is provided with the friction reduction belt, therefore a contact position between the screw protection cap and the sleeve can be reduced, the friction resistance can be reduced, and the screw protection cap can be easier dismounted from a male button; furthermore, the outer surface of the screw protection cap is provided with the skid resistance belt, the problem that a pair of chain tongs is likely to slide off when the screw protection caps of the chain tongs are in use, and the field operation safety can be improved. The screw protection cap provided by the invention is simple in structure, convenient to operate and low in investment cost, thereby being extensively applicable to the field of petroleum drilling.