Based on the mechanism of road sense,the modular design of steering system was studied,by which loadsensitive balance valve and steering gear were integrated,reducing the steering wheel control force imposed by driver and decreasing physical labor.HCD module of AMESim was used to simulate and model the common steering system and loadsensitive balancing valve steering system respectively.The dynamic characteristics of the loadsensitive steering system were verified by comparing and analyzing them.Setting up a testbed for experimental research under different steering load,different steering wheel speed conditions,the experimental data and simulation results were compared,its steering characteristics were analyzed,the accuracy of the simulation model was verified.