Abstract: In view of the problems of poor adaptability, high grain damage rate and low stripping rate of the existing small corn harvester in hilly area in complex field environment,a stripping device with hydraulic attitude adjustment was designed. In this paper, the performance analysis and parameter optimization of corn ear peeling device were carried out,in order to reduce the grain loss rate and improve the ear peeling rate. The experiment was carried out with the speed of peeling roller, running speed, inclination angle of peeling device and horizontal plane and the speed of pressure device as the test factors,and the grain loss rate and the net peel rate of fruit spike as the test indexes,and the mathematical model of parameter optimization was established. Using the optimization module of design expert, the results show that the speed of peeling roller is 853. 081r/min,the driving speed is 0. 799955m/s, and the inclination angle is 16°,the pressure feeding device is 500r/min, the grain loss rate is 0. 204945%,and the stripping rate is 98. 1179%. The results show that the optimized parameters can meet the technical requirements of corn ear harvest in mountainous and hilly areas.