Hydrocracking catalyst containing mesoporous-microporous molecular sieve and preparation method of catalyst

The invention relates to a preparation method of a hydrocracking catalyst containing a mesoporous-microporous molecular sieve. The hydrocracking catalyst comprises hydrogenation active metal, the mesoporous-microporous molecular sieve, aluminium oxide and amorphous silicon aluminum. The preparation method of the mesoporous-microporous molecular sieve comprises the steps of synthesizing a Y zeolite precursor by taking a common silicon source and aluminium source as raw materials, and adding a template agent to the precursor for assembling to obtain the molecular sieve with a mesoporous-microporous structure. The mesoporous-microporous molecular sieve has the properties of having the specific surface of 400-600 m<2>/g, the total pore volume of 0.6-1.0 ml/g, the relative crystallinity of 90%-110%, the crystal cell parameter of 11.5nm-14.0nm, the silica-alumina ratio of 30-100, the infrared acid content of 0.2-0.8 mmol/g and the sodium oxide content of less than or equal to 0.05wt%. The hydrocracking catalyst prepared by the method has the characteristics of being high in activity, good in selectivity of target products, high in production and quality of tail oil, etc.