Based on RecurDyn software, the simulation model of multi-body virtual prototype and wetland pavement model of flat wetland crawler bulldozer was established, and the dynamic simulation and comparative analysis of the steering process of flat wetland crawler bulldozer under different humidity pavement and different working conditions were carried out based on the multibody dynamics theory and method. By studying the influence of parameters such as steering angular velocity and turning radius on the steering performance of crawler bulldozer during steering, this paper provides a certain reference for the design and optimization of the traveling system of wetland crawler bulldozer.