The invention discloses a method for preparing a hydrocracking catalyst. In the catalyst,
amorphous silicon aluminum and aluminum
oxide are taken as a carrier, group VIII and VIB
metal is taken as a hydrogenation
active ingredient, and the catalyst contains an active substance B2O3 preferably. The catalyst is prepared by mixing and forming the
amorphous silicon aluminum and the aluminum
oxide,
drying, loading active
metal by an impregnation method,
drying and
roasting. Compared with the conventional impregnation method, the method has the advantages that: the formed catalyst is not roasted, so that the preparation process is simplified, time and energy are saved,
strong interaction between the active
metal and the carrier is reduced, the metal is uniformly distributed, the activity of themetal is more easily exerted, and the specific surface area is prevented from being lost due to multi-step
roasting. The catalyst prepared by the method is particularly suitable for the processes of hydrocracking distillate oil and hydrogenating productive middle distillate oil, and has
high activity and middle distillate oil selectivity.