Electro-hydraulic control valve that precisely controls hydraulic flow rate and pressure through electrical signals in hydraulic systems. Used for positioning control and speed control in NC machine tools, injection molding machines, press machinery, etc., providing feedback control of actuator operation through electrical signals. Composed of pilot valve and main valve, achieving hydraulic output proportional to electrical signals. Unlike conventional directional control valves or pressure control valves, enables continuous proportional control with high responsiveness and high-precision control performance as an advanced hydraulic valve.