The DSA type progressive distributor consists of 3-10 working valve plates, with both the head and tail valve plates being working valve plates, and mounting brackets installed on the head and tail valve plates. The DSA type distributor has four displacement specifications, and users can choose different displacement specifications for combination. Each displacement specification is marked according to the actual displacement of the valve disc oil outlet. The distributor valve plates are sealed with O-ring seals, which have good overall sealing performance and stable and reliable oil output.