The feed-in mechanism model of a harvester has been researched based on the CAD software. The mechanical dynamics software MSC.ADMAS was used to establish the 3-D kinematic simulation model of corn stalks feed-in mechanism for no-row corn harvesting. The process of making kinematics model and its simulating were to set forth at length. The simulation based on software MSC.ADAMS was successfully got along. The results demonstrated that the harvesting speed and the rotating speed of finger rotor were main influencing parameters on the performance of the feed-in mechanism. The shape of finger rotator, especially the shape of the fingers' end, had a notable influence on the motion of corn stalks. Some ameliorative suggestions were provided to the corresponding physical mechanism.