Abstract:The quality of the dynamite produced by local mix-load explosive vehicle was vary much depended on the proportion of the materials and speed of the sensitized device. The motor speed in the hydraulic control system was adjusted by using the electro hydraulic proportional valve, because of the complex environment, the premises of a constant load during the proportional valve was controlled and adjusted could not be met. The control model of electro-hydraulic proportional valve was established in AMESim environment, then analyzed its ability to response performance of the load, and optimized the design of control system. The results of simulation show that optimized control system can eliminate the impact of fluctuating load on the speed, and provide basis for the design about hydraulic control system used for local mix-load explosive vehicle.