Vertical axial flow fan

The utility model discloses a vertical axial flow fan which comprises a fan body, first rotating shafts are fixed to the two sides of the fan body, supporting plates are rotatably connected to the outer surfaces of the two first rotating shafts, a connecting plate is fixedly connected between the two supporting plates, and a liftable storage box is arranged on the lower surface of the connecting plate. A rack is fixedly arranged in the middle of the upper surface of the connecting plate, and the outer surface of the connecting plate is engaged with a gear. According to the fan, the fan body, the connecting supporting plate, the storage box, the rack and the gear are arranged, the gear rotates to make the gear do circular motion along the rack with the first rotating shaft as the axis, angle adjustment of the fan body is achieved, after adjustment, the motor stops operating, the gear does not rotate any more and is fixed to the fixed position of the rack, and angle fixation of the fan body after adjustment is