Detachable airframe reinforcing frame

The utility model relates to a detachable airframe reinforcing frame. The detachable airframe reinforcing frame is characterized in that: the reinforcing frame is in the shape of W overall; both ends and the curved surface of the reinforcing frame are provided with screw holes which are connected with the upper half frame of an airframe; the lower side of the reinforcing frame is provided with a bolt hole connected with a cabin door; and the curved surface is provided with a reinforcing rib. The detachable airframe reinforcing frame can participate in the overall stress of the airframe, meets the requirements on the strength and the stiffness of the airframe at large openings, reduces the structural weight of airplanes and ensures that engines are quickly disassembled and assembled.