The models of stripper rollers of a certain type of corn harvester and corn plants were established in Pro/E. And then, these models were led to the ADAMS environment with the interface of MECHANISM/Pro to create the virtual prototyping models including constrains and motions. The harvesting process was simulated based on the ADAMS techniques of sensor and manuscript control. The simulation data analysis was mainly focused on the case that the corn plants at the angle of 79°. Finally, the best inclination angle of plant, 89°, was derived based on the analysis of harvest time and grain hurt rate.