In order to analyze the key characteristics of the electronic weighing valve,which was contained in the bogiecontrolled braking system, the simulation model of a electronic weighing valve was established by using AMESim software.The influence of the different feedback throttle and the different pilot throttle on the inflatable performance of the electronic weighing valve was studied, and the influence of the reset spring force of the main regulator on the control accuracy of the electronic weighing valve was analyzed. The results show that there is no overcharge phenomenon in the electronic weighing valve when the diameter of the feedback throttle is greater than1 mm; when the diameter of the pilot throttle is greater than 0.8 mm, the response time of the electronic weighing valve meets the requirements; the greater the reset spring force of the main regulator, the lower the control accuracy of electronic weighing valve.