In order to study the application of virtual simulation technology in the study of emulsion characteristics, AMESim software was used to establish K35055M emulsion pump Simulation model of hydraulic system, the dynamic of fluid absorption and drain valves were studied, by analyzing the simulation results, the valve  core speed curve under different bent axle speed, pump head from the main source of vibration and noise, volumetric efficiency under different  rotate speed were obtained, the practice showed that simulation result was basically same with actual situation.