The invention provides a gravity center adjusting device for a short-distance conveying tire hooping tool. The gravity center adjusting device comprises a conveying belt, horizontal supporting rods and a control base plate, wherein the conveying belt is mounted on the horizontal supporting rods; the horizontal supporting rods are mounted on a left vertical supporting rod and a right vertical supporting rod; the control base plate is mounted inside the horizontal supporting rods; a horizontal sensor, a microprocessor, a memory, a relay and a battery are welded on the control base plate. Compared with the prior art, the gravity center adjusting device disclosed by the invention has the following beneficial effects of automatically keeping the horizontal supporting rods horizontal so as to guarantee the horizontality of the overall conveying belt, and being convenient to use, convenient to operate, good in stability and high in reliability.