The invention provides a wheel track stepless regulation type omnibearing mobile platform truck chassis for industrial and agricultural transport. Modular design concept is adopted in the wheel track stepless regulation type omnibearing mobile platform truck chassis. The whole car chassis comprises four modules, structures of a module 1 and a module 2 are in a bilaterally symmetrical type, a module 3 and the module 1 are identical in structure, and a module 4 and the module 2 are identical in structure. The module 1, the module 2, the module 3 and the module 4 are connected through ball screws in sequence, and the module 4 is connected with the module 1 through another ball screw. In each module, a direct-current servo motor drives a small synchronous wheel to rotate, a synchronous cog belt transfers power to a large synchronous wheel to drive an axle to rotate, and Mecanum omnidirectional wheels are driven to rotate. By means of the wheel track stepless regulation type omnibearing mobile platform truck chassis, a platform truck can move forwards, move transversely and perform pivot steering, transport under the conditions of lack of space is achieved effectively, and stepless regulation can be performed on the wheel track of the platform car according to the width of the road and the volume of loads.