The invention discloses a variable-pitch aircraft which comprises a supporting frame, and multiple variable-pitch rotation wings installed on the supporting frame. Each variable-pitch rotation wing comprises a driving shaft, a first wing sheet, a second wing sheet, a propeller hub and a driving part. The impeller hub is fixed to the driving shaft. The first wing sheet and the second wing sheet are symmetrically arranged on the two sides of the impeller hub. The driving part can act on the first wing sheet and the second wing sheet at the same time and drive the first wing sheet and the second wing sheet to overturn in the clockwise direction and the anti-clockwise direction. According to the variable-pitch aircraft, the variable-pitch rotation wings can change the screw pitches within a certain rotation speed range to achieve the function of optimizing the aerodynamic force of the wing sheets. Meanwhile, the variable-pitch aircraft can change the propeller thrust direction.