In order to study the cutting effects of corn stubble cutting and returning device, orthogonal experiment was conducted from three factors, including stubble cutting height, stubble cutting linear velocity and operating speed. Each factors performed three levels. The experimental data were analyzed in SPSS software. The results showed that the optimal operation combination was: stubble cutting height of 15 mm, stubble cutting linear velocity of 12.385 m/s and forward speed of 0.8 m/s in a given level. Single factor experiment was conducted on stubble cutting height. The drawing was plotted and the data was fitted by Origin software. The computation indicated the highest value of stubble cutting height for finishing stubble cutting work was 22 mm under fixed stubble cutting linear velocity of 12.385 m/s and forward speed of 0.8 m/s.