The invention discloses a diesel oil liquid phase hydrogenation pour point depressing process. A diesel raw material and circulating oil enter a liquid-phase hydrofining reactor under a liquid-phase hydrogenation condition, and the material passing through a hydrofining catalyst bed layer is divided into three streams; one material stream is fed into a liquid phase hydrogenation pour point depressing reactor for a hydrogenation pour point depressing reaction under a liquid phase hydrogenation pour point depressing condition, and the reacted stream is subjected to gas-liquid separation and fractionation; a second material stream is directly subjected to gas-liquid separation and fractionation so that diesel oil products with different specifications are obtained. The invention provides thehydrogenation process for simultaneously producing more than two diesel oil products with different specifications on one set of liquid phase hydrogenation process equipment for the first time, heat carried by part of hydrofined materials can be fully utilized, and coupling operation of the liquid phase hydrofining reactor and the liquid phase hydrogenation pour point depressing reactor is realized.