The utility model relates to a syllogic fixed wing uavs with protection device, this fixed wing uavs's wing are syllogic airfoil structure, including the slat that sets up at leading edge, set up the main wing in the middle of the wing and set up the wing flap at wing trailing edge, the main wing includes the central wing and sets up the outer wing in central wing both sides, the wing flap including set up the wing flap of central wing trailing edge with set up the flaperon at the outer wing trailing edge, draw the formula screw before the fuselage front end is equipped with, protection device includes screw protection device, wingtip protection device, fin protection device. The utility model discloses an advantage embodies: higher maximum lift coefficient has for the aircraft has the biggest higher lift, can carry out equitable protection to fuselage and screw simultaneously.