The invention discloses a hydrogenation process for producing diesel oil with a low condensation point. The process comprises the following steps: after hydrofining a diesel oil raw material, feedingthe diesel oil raw material into a hydro-upgrading reactor; dividing the material passing through a hydro-upgrading catalyst bed layer into two streams; extracting one material stream out of the hydro-upgrading reactor from the middle of the bed layer, and feeding the extracted material stream into a hydroisomerization pour point depressing catalyst bed layer for pour point depressing reaction; allowing the other material stream to continue flowing downward to pass through a lower hydroisomerization pour point depressing catalyst bed layer; and respectively carrying out gas-liquid separation and fractionation on an obtained hydroisomerization pour point depressing reaction material and an obtained hydrogenation pour point depressing reaction material to obtain diesel oil products with different specifications. The invention provides the hydrogenation coupling process for simultaneously producing more than two diesel oil products with different specifications on one set of hydrogenationprocess equipment for the first time, heat carried by a part of hydro-upgraded materials can be fully utilized, and coupling operation of a hydro-upgrading pour point depressing reactor and a hydrogenation pour point depressing reactor is realized.