Disclosed in the present invention is an aircraft having an air crash lifesaving function. The aircraft comprises a nose, a passenger cabin and wings disposed on the left side and the right side of the passenger cabin. The wings and the passenger cabin are detachably connected by means of a plug connector assembly, and the plug connector assembly comprises a pair of jaws, a clamping groove cooperating with the jaws, and a driving member for driving the jaws to be opened to press against the clamping groove or driving the jaws to folded to separate the jaws from the clamping groove. Parachutes capable of being unfolded after the wings are separated and reverse jet devices for reducing the falling speeds of the nose and the passenger cabin are disposed on the passenger cabin; at least one inflation unit for buffering the falling impact force of the passenger cabin and the nose is also disposed at the bottom of the passenger cabin. When an accident happens to the aircraft, the wings are separated from the other positions of the aircraft in the first place to save pilots and important control elements in the nose on the basis that passengers in the passenger cabin are saved, so that the passengers on the aircraft with such an accident and most of important components of the aircraft are safely landed, and air crash loss is reduced.