In order to get a connecting rod bushing with high forming quality, for the QSn7-0.2 bushing connecting rod, the experiment table was established by the response surface method with the inner diameter expansion, external roundness error and straightness error of forming quality as evaluation indexes and with the working angle, arc radius and offset of axis direction of rotation wheel parameters as variable factors. Then, the influences of rotation wheel parameters on the forming quality were analyzed by software Simufact, and the optimal combination of rotation wheel parameters was obtained and tested by experiment. The results show that the optimal combination of rotation wheel parameters in forming quality is offset of  axis direction of 5 mm, working angle of 20°, arc radius of 4 mm, and the sequence of influences on the inner diameter expansion is  arc radius >working angle>offset of axis direction. While that on the external roundness error is working angle>arc radius>offset of axis direction. And that on the straightness error is arc radius >working angle>offset of axis direction.