Novel regulating valve

The utility model relates to a novel regulating valve used for high-pressure-difference working conditions in the fields of power generation and petrifaction. The novel regulating valve is composed of a valve body, a valve seat, a labyrinth sleeve assembly, a valve clack, a bolt, a valve cover and a valve rod. The labyrinth sleeve assembly is composed of a base, a plurality of disc assemblies, pin shafts and an upper sleeve, and the two pin shafts are adopted for positioning connection. The disc assembly is composed of three labyrinth discs, each labyrinth disc is evenly divided into n areas, two U-shaped flow channels are arranged in one third area, a 90-degree right-angle turning labyrinth flow channel is arranged in one third area, no flow channel is arranged in the rest one third area, and the flow channels are arranged in the rest one third area at intervals. The labyrinth sleeve assembly is internally provided with a plurality of 90-degree right-angle turning labyrinth runners, so that the problems of c