The working principle of electric gate valve is mainly to use the power generated by the electric device, through the precision transmission mechanism to drive the valve stem, and then drive the valve spool up and down along the axis direction, to achieve precise control of the fluid. After the electric device is connected to the power supply, the motor generates a rotating torque, which is converted into a linear movement of the valve stem through the transmission mechanism, so that the valve spool moves, thus regulating the valve opening and realizing the opening, regulation or closing of the fluid. When it is necessary to stop the flow of fluid, cut off the power supply can make the valve closed, to achieve the purpose of controlling the flow of fluid.