Abstract: Aiming at the operating conditions of the two-stage crawler motion mechanism in complex environments such as hills and mountains, a simulation model was established with the help of multi-body dynamics simulation software RecurDyn-Track＿LM with the aim of optimizing the motion posture and setting up control strategies.The correctness of the simulation model is verified by analyzing the vertical displacement and frequency change of the center of mass of the front and rear crawler tracks; by analyzing the three important abilities of the vehicle’s running deviation, continuous climbing, and obstacle crossing, the performance of the two-stage crawler mechanism is described.The movement, posture changes and dangerous working conditions of the crawler mechanism.This research can also be used as a reference basis for evaluating the sports performance and driving reliability of this type of tracked vehicle.