The DSD progressive distributor is a disc distributor composed of only two valve plates, with a compact overall structure and easy assembly, making it very suitable for use in narrow spaces. The DSD type distributor can provide 2, 3, 4, and 6 oil outlets, suitable for lubrication systems with fewer lubrication points. It can also be used as a main distributor in combination with other multi-point distributors. The distributor valve plate adopts an O-ring seal, which is suitable for a wide temperature environment and has good sealing performance.