In order to research operation parameters of corn straw adjusting material device based on horizontal roller on the influence law of power consumption, a self-developed straw adjusting material test device and power measurement and control system were used to implement continuous adjusting material orthogonal test of corn straw. The influence of the adjusting material roller’s working clearance, the adjusting material roller’s speed of rotation and the feeding speed of straw on power consumption of the straw adjusting material was analyzed. Research showed that the adjusting material roller’s working clearance significantly influenced on the power consumption. The parameters combination were the adjusting material roller’s working clearance of 2.5mm, the adjusting material roller’s speed of rotation of 88～95r/min, the feeding speed of 3.3～4.0km/h, which met the requirements of adjusting material performance and reducing power consumption.