The invention discloses a hydrocracking catalyst, which comprises modified Y/Beta double micro-porous molecular sieve, other carrier material and hydrogenation active components. Wherein the total silica-alumina mass ratio of the modified Y/Beta double micro-porous molecular sieve is 6.5 to 60.0, the BET specific surface area is 350 m<2>/g to 650 m<2>/g, the pore volume is 0.25 ml/g to 0.40 ml/g, and the infrared acidity is 0.50 mmol/g to 1.5 mmol/g. The catalyst preparation method adopts an impregnation method, and the modified Y/Beta double micro-porous molecular sieve is modified and processed with a firstly making up silicon and then roasting method. The hydrocracking catalyst has a higher service performance when being used in the heavy distillate oil hydrocracking, and can be used in various types of hydrocracking process.