Co-current flow hydrocracking method for increasing production of middle distillates

One kind of middle distillate yield and flow hydrocracking process, the fresh feed oil to flow the way and at the same time introducing hydrotreating reactor and hydrocracking reactor; hydrocracking reactor successively loaded amorphous hydrocracking zeolite catalyst and hydrocracking catalyst; reactor hydrotreating reactor effluent is separated to obtain light naphtha distillates, heavy naphtha fraction, a middle distillate oil fraction and tail; all or part of the tail into the oil fraction hydrocracking reactor , a hydrocracking reactor effluent reaction with part of the feed oil into the hydrotreating reactor together. The present invention provides a method capable of handling heavy fraction oil, the oil middle distillate production.