Novel pressure-reducing valve

The invention relates to a novel pressure-reducing valve. The novel pressure-reducing valve comprises a valve body, a surfacing valve seat, a valve cover and a pressure-regulating bolt, wherein a three-way cavity is arranged in the valve body; the surfacing valve seat is arranged at an included angle of the cavity; the surfacing valve seat and a valve plate are extruded by a spring to seal an inlet; a control sleeve is coaxially arranged outside the spring; a hole is formed in the middle of the valve cover; the hole is used for mounting the pressure-regulating bolt; the valve body is connected with the valve cover through a bolt, and the valve body and the valve cover are sealed by a sealing pad; an indicating slot is formed in the upper surface of the valve cover; square indicating rods are arranged in the indicating slot; a square indicating blind hole is formed in the valve cover close to the edge of the pressure-regulating bolt; and the indicating rods are coaxially embedded into the indicating blind hole