Parallel-flow hydrogenation method for producing intermediate fraction oil

The invention relates to a parallel-flow hydrogenation method for producing intermediate fraction oil, which comprises the following steps: fresh oil raw materials are simultaneously introduced into a hydrofining reactor and a hydrocracking reactor in a parallel-flow mode, wherein the fresh oil raw material entering the hydrocracking reactor is divided into a plurality of streams which are respectively fed among the beds of the hydrocracking reactor; and the reaction effluent of the hydrofining reactor is subjected to tail oil fraction separation and enters the hydrocracking reactor, and the reaction effluent of the hydrocracking reactor enters the hydrofining reactor together with part of the oil raw material. The method provided by the invention can treat heavy fraction oil, and maximally produce the intermediate fraction oil.