The invention discloses a landing device and method for a fixed-wing aircraft and belongs to the technical field of aircrafts. The landing device comprises the fixed-wing aircraft and a multi-rotor aircraft; three same lifting rings, three same infrared light emitting diodes, and a GPS positioning module are installed on the fixed-wing aircraft; three self-locking lifting hooks and three same infrared cameras are installed on the multi-rotor aircraft; each self-locking lifting hook is provided with a locking bar, and the locking bars can seal notches of the self-locking lifting hooks to limit movement of the lifting rings; the multi-rotor aircraft positions the fixed-wing aircraft by receiving the information of the GPS positioning module installed on the fixed-wing aircraft; the three infrared light emitting diodes on the fixed-wing aircraft and the three infrared cameras on the multi-rotor aircraft are aligned precisely and correspondingly; and the three self-locking lifting hooks hook three lifting rings correspondingly. The landing device and the method of the fixed-wing aircraft can manufacture an air runway for take-off and landing of the fixed-wing aircraft, and construction of the runway needed by take-off and landing of the fixed-wing aircraft is reduced.