A snowmobile power loading connection rack comprises a driving wheel plate, a connection plate and a driven wheel plate, wherein the driving wheel plate, the connection plate and the driven wheel plate are formed integrally. A driving shaft hole is formed in the center of the driving wheel plate. The contour of the driving shaft hole is composed of a plurality of semicircular first arc angles and second arc angles. The driving shaft hole is defined by the first arc angles and the second arc angles in staggered mode, and the first arc angles are in circular arc transition with the second arc angles. The radius of each first arc angle is larger than that of each second arc angle. Installation holes are formed in the positions close to the second arc angles. The connection plate obliquely extends from one side of the driving wheel plate and then is connected with the driven wheel plate. A through hole is formed in the connection plate. The driven wheel plate comprises a main plate body, a side plate body and an auxiliary plate body. The snowmobile power loading connection rack is arranged between an engine body of a snowmobile and a driving wheel, a driven wheel and a belt, the connection position precision and connection rigidity between the driving wheel, the driven wheel and the belt of a driving device of the snowmobile and the engine body are guaranteed, and the position precision and connection rigidity are high.