Wing tip sail device for general fixed-wing aircraft

The invention relates to a wing tip sail device for a general fixed-wing aircraft. A rectifying cone is arranged on a wing tip en and is spirally provided with a front sail, a middle sale and a back sail from front to back, wherein the dihedral angle and the installation angle of the front sail are 30 DEG and -5 DEG, respectively, the dihedral angle and the installation angle of the middle sail are 15 DEG and -2.5 DEG, respectively, and the dihedral angle and the installation angle of the back sail are 0 DEG and 0 DEG, respectively. The wing tip sail device provided by the invention has the advantages of a simple structure and convenient installation, can effectively comb and straighten wing tip vortices when arranged on the wing tip of the aircraft and is capable of reducing induced drag during flight of the aircraft, improving pneumatic efficiency of the sails and enhancing lifting force of the body of the aircraft.