Aiming at the elevator equipment of potato harvester, an integration simulation method based on Adams-Matlab and limit algorithms used in anti-collision control was proposed. The simulation and pre-description on the anti-collisions of two-freedom elevator were carried out by analyzing the anti-collision problem. The curves of angle θ1 and θ2 of potato harvester elevator with the time, the curves of distance between the end of harvester elevator and potato pile with the time, and the curves of distance between the elevator and the trailer with the time, were obtained respectively. The results showed that the limit algorithm and control method for this case was feasible, and the anti-collision of elevator motion was satisfying.