According to the mechanical characteristics of the terrain of sea bed cobalt crusts and hydrothermal sulfide mining,based on the traditional road tracked vehicle,a solid wheels-rubber tracked traveling mechanism in deep sea bed is designed. The dynamics modeling of tracked traveling mechanism in deep sea bed is built based on the structural characteristics. In dealing with the engaging force,the application of elastic contact theory,the meshing force is equivalent to the force of the resilient contact. The driving force mechanism is analyzed and the influencing factors are analyzed. Based on Recurdyn,the simplified dynamics model of the traveling mechanism in deep sea bed is built,imposing constraints,contacts,forces and motion control functions,and the terrain and environmental conditions in different types when run under the sea bed are analyzed.The results show that,the engaging force between solid wheel and track pin changes with the positive pressure changes,the positive pressure occurs the maximum and corresponding to the maximum of engaging force,then the positive pressure and engagement force is cyclical change along with the caterpillar. Meanwhile,a greater ripple of the speed,running gear,acceleration,driving torque and so on is caused by the tracked speed dynamic load. However,the tracked traveling mechanism is still running driven relatively stable.