The invention discloses a flight vehicle generating a lift from an interior thereof. The fluid channel inside the flight vehicle communicates with the engine and the ports on the upper surface of the outer shell. With the powerful suction of the engine, the fluid on the upper surface of the outer shell is quickly sucked into the fluid channel via respective ports under conditions of long path, large area, high speed and low air pressure, which results in large lift from the interior of the flight vehicle. In the course of generating the lift, the fluid resistances of the fluid wall and the fluid hole are sucked into the fluid channel through the ports at the front and the surrounding area of the flight vehicle, then high-speed fluid is emitted from the rear port. This approach contributes greatly to the transformation of the existing flight vehicle. The present invention significantly improves the lift, the speed and the carrying capacity of the existing flight vehicle with lowered energy consumption.