DSF type progressive distributor is a small displacement plate distributor, which is composed of a first piece installation valve plate and several working valve plates. Generally, a group of DSF type distributors has 3-10 working valve plates, and the valve plates have four displacement specifications. Different displacement specifications can be selected for combination. The working valve plate of the distributor is a structure of oil outlet on both sides, which can be changed into a single oil outlet by merging, and the displacement is superposed. O-ring seal is adopted between the distributor working valve plates, which has good sealing performance and stable and reliable oil delivery.