The utility model relates to a cement buoyancy valve in a gas pump drainage hole operating sleeve. The cement buoyancy valve in the gas pump drainage hole operating sleeve comprises the operating sleeve, a high-pressure valve, a welding plate, a throttle valve, a gas tube and a cement paste body. The welding plate is arranged at the bottom of the buoyancy valve. The periphery of the welding plate is welded on the inner wall of the operating sleeve. The gas tube penetrates through the cement paste body in a longitudinal mode. The high-pressure valve is welded on an opening at the upper end of the gas tube. The throttle valve is welded on the lower portion of the gas tube. A steel bar ring and a metal overhead hook are further welded on the inner wall of the operating sleeve. According to the buoyancy valve, not only is gas filled to the lower portion, but also the steel bar ring and the metal overhead hook are arranged on the inner wall of the buoyancy valve, a skid resistant property of the buoyancy valve is added, high-pressure environment of the lower portion of the buoyancy valve is adapted in a better mode, dangerousness of invalidation of the buoyancy valve is reduced, and a regular buoyancy piston can be widely replaced in practical engineering application.