The invention discloses a wing folding mechanism of a wing upper anticonfiguration aircraft, and belongs to the field of aircraft design. The unmanned aerial vehicle comprises folding wings, folding wings, inter-wing torsion springs, locking pin springs, locking pins, a
wing loading platform, fixing bolts, upper counter locking pin springs, upper counter locking pins, supporting rods, side plates, upper counter tension springs and sliding supporting rods. Interference during folding of the wings of the large-
wingspan aircraft is avoided through upper and lower layering of the wings, the wings with dihedral angles are rotated to be placed horizontally through the sliding platform, the storage space is reduced, the wings are rapidly unfolded after leaving a launch canister through the torsional springs arranged in the wings, locking is conducted through the locking pins, and the aircraft can be rapidly put into use. According to the invention, the wing is quickly unfolded and locked by adopting an upward-reversing and unfolding step-by-step limiting structure mode; by adopting the mode of combining the upper back locking and the tension spring, the folding process is simplified, the complexity of the folding mechanism is reduced, and the storage space after folding can be reduced.