Through the selfdesigned test-bed of helix teethroller corn straw adjusting material device, the snapping corn straw were cracked and broken continuously by different rolling way of teeth-roller adjusting material device. In order to reach the optimal parameter combination, effect on processing teeth-roller’s working clearance, speed of rotation and feeding speed of adjusting material device was analyzed by using the orthogonal tests method. The results showed that teethrollers working clearance significantly influenced processing performance. Optimal group of parameters was the working clearance of 2mm，the feeding speed of 4km/h, the rotate speed of the teeth-roller of 65r/min. 