Multi-clamping-position folding winglet and working method thereof

The invention discloses a multi-clamping-position folding winglet and a working method thereof. The multi-clamping-position folding winglet is arranged at the tail end of a wing body in the wingspan direction and is provided with a ground clamping position, a cruising flight clamping position and at least one low-speed flight clamping position, the multi-clamping-position folding winglet comprisesa winglet body and a driving part, the winglet body is rotationally connected with the tail end of the wing body, and the driving part can drive the winglet body to rotate in order to make the winglet body switched between different clamping positions; and the included angle between the chord plane of the winglet body and the vertical plane of the ground plane is defined as an inclination angle,and the inclination angle of the winglet body at the low-speed flight clamping position is larger than that at the ground clamping position and smaller than that at the cruise flight clamping position. In the flight process, d