The mechanical configuration and work principle of the direct-acting solenoid valve used in one liquid fuel rocket engine are described. The magnetic field simulation model of the solenoid valve based on Ansoft and the entire simulation model of the solenoid valve system based on AMESim were built. The simulation result of the Ansoft solenoid model was made use of in building the AMESim solenoid valve model. The couple simulation of electromagnetic circuit, mechanical components and hydraulic system was realized. An experiment on the dynamic characteristics of solenoid valve was conducted, which verify the established simulation model can accurately calculate the characteristics of valve.