The invention provides a retractable apron structure of an amphibious aircraft. The retractable apron structure comprises an apron structure and a
capsule body retracting device. The apron structure comprises an arc-shaped rigid surface and a
capsule body, wherein one end of the arc-shaped rigid surface is hinged to a
hull, the other end of the arc-shaped rigid surface is hinged to the
capsule body, the capsule body is further hinged to the bottom of the
hull, and an exhaust hole channel is arranged at the joint between the capsule body and an
air chamber. The capsule body retracting device comprises a connecting
rope, a miniature electric hoist and a connecting piece, wherein the miniature electric hoist is arranged at the top end of the
air chamber, the connecting piece is arranged on the capsule body, the connecting piece is connected to one end of the connecting
rope, and the miniature electric hoist is connected to the other end of the connecting
rope. The retractable apron structure of the amphibious aircraft is simple in structure, easy to operate and convenient to inspect and maintain, and can well adapt to two working conditions of an
air cushion aircraft, the response ofthe apron structure is higher during sailing at sea, and the
seakeeping is good; and the retractable apron design can reduce the flying resistance during flying, and the
air cushion aircraft is enabled to have better navigation performance.