Abstract: This paper briefly introduces the basic structure of the radial truck fortilting car and analyzes the primary principle of the force-steering bogie. It also builds a model for the whole car’s system dynamics analysis, based on the characteristics of the tilting car and the force-steering bogie. By using the computer simulation program, itoptimizes the key parameters ofthe mechanism. The results can supplythe theoretical arithmetic foundation for the engineering design of the force-steering bogie for the tilting car.