Main landing gear for takeoff and landing of airplane and takeoff and landing method of main landing gear

The invention belongs to the technical field of aircraft landing gear design, and particularly relates to a main landing gear for takeoff and landing of an aircraft and a takeoff and landing method of the main landing gear. The main landing gear for takeoff and landing is designed to replace an existing main landing gear and is connected to the bottom of an aircraft body in the takeoff and landing process of the aircraft to assist takeoff and landing of the aircraft; when the aircraft flies in the air, a main undercarriage is not carried, so that the weight of the aircraft flying in the air can be reduced, the oil consumption of the aircraft is reduced, the obstacle crossing ability of an aircraft route is improved, an undercarriage cabin with a large size does not need to be arranged in the middle of the aircraft, the occupation of the internal space of the aircraft can be reduced, the design constraint of an aircraft body is reduced, and the difficulty of aircraft layout design is reduced; the aerodynamic r