Abstract: According to the complicated control of a mine electric valve applied to the mine water drainage and the ineffective when was in water and other defects, a mine submersible electric and hydraulic controlled valve was designed and the mechanical structure composition and working principle of the valve was introduced.A power bond graph theory and MATLAB software was applied to the simulation analysis on the dynamic features of the open process of the hydraulic cylinder applied in t he mine submersible electric and hydraulic control valve.The results showed that the speed fluctuation value occurred in the open process of the hydraulic cylinder was about 4% of the base value and the speed fluctuation would have less influence to the hydraulic system of the mine submersible electric and hydraulic control valve. The Pro/Engineer and FLUENT was applied to study the variation law of the flow field within the valve and pipeline when the mine submersible electric and hydraulic control valve was in water.The simulation results showed that the parameters operated in the flow field of the valve were basically stable, could meet the requirements of the e mergency water drainage in underground mine.