A vertical take-off and landing fixed-wing aircraft, comprising a fuselage provided with two fixed-wings and a thruster; a storage room is configured inside the fuselage, a plurality of openings and their corresponding doors are configured on the fuselage, and the openings are connected to the storage room; a driving mechanism, and a deployable supporting mechanism driven by the driving mechanism are arranged inside the storage room; wherein the deployable supporting mechanism comprises a first supporting arm, two vertical lifters are respectively mounted on outer ends of the first supporting arm; the first supporting arm comprises a first end arm, a second end arm and a hinge segment in the middle part of the first supporting arm, the first end arm and the second end arm are rigidly coupled via the hinge segment on opposite sides of the hinge segment, the first supporting arm is movably connected to the fuselage at the hinge segment via a hinge shaft; wherein the deployable supporting mechanism further comprises a second supporting arm including a first end arm, a second end arm and a hinge segment in the middle part of the first supporting arm, the first end arm and the second end arm are rigidly coupled via the hinge segment on opposite sides of the hinge segment, two vertical lifters are respectively mounted on outer ends of the second supporting arm; each of the first supporting arm and the second supporting arm is movably hinged to the hinge shaft via respective hinge segment, to form an "X" shape, the hinge shaft is connected to the fuselage; the fixed-wing aircraft has an open state and a closed state, in the open state, the doors open and the vertical lifters spread out outside the storage room through the doors, by the act of the deployable supporting mechanism, the vertical lifters on the first supporting arm are located on opposite sides of the fuselage, the vertical lifters on the second supporting arm are located on opposite sides of the fuselage; in the closed state, the vertical lifters are located within the storage room by act of the deployable supporting mechanism while the doors closed. a storage room is configured inside the fuselage, a plurality of openings and their corresponding doors are configured on the fuselage, and the openings are connected to the storage room; a driving mechanism, and a deployable supporting mechanism driven by the driving mechanism are arranged inside the storage room; wherein the deployable supporting mechanism comprises a first supporting arm, two vertical lifters are respectively mounted on outer ends of the first supporting arm; the first supporting arm comprises a first end arm, a second end arm and a hinge segment in the middle part of the first supporting arm, the first end arm and the second end arm are rigidly coupled via the hinge segment on opposite sides of the hinge segment, the first supporting arm is movably connected to the fuselage at the hinge segment via a hinge shaft; wherein the deployable supporting mechanism further comprises a second supporting arm including a first end arm, a second end arm and a hinge segment in the middle part of the first supporting arm, the first end arm and the second end arm are rigidly coupled via the hinge segment on opposite sides of the hinge segment, two vertical lifters are respectively mounted on outer ends of the second supporting arm; each of the first supporting arm and the second supporting arm is movably hinged to the hinge shaft via respective hinge segment, to form an "X" shape, the hinge shaft is connected to the fuselage; the fixed-wing aircraft has an open state and a closed state, in the open state, the doors open and the vertical lifters spread out outside the storage room through the doors, by the act of the deployable supporting mechanism, the vertical lifters on the first supporting arm are located on opposite sides of the fuselage, the vertical lifters on the second supporting arm are located on opposite sides of the fuselage; in the closed state, the vertical lifters are located within the storage room by act of the deployable supporting mechanism while the doors closed.