Catalytic cracking catalyst and preparation method thereof

The present invention provides a catalytic cracking catalyst and a preparation method thereof, the catalytic cracking catalyst comprises, by weight, 15-50% of a rare earth ultra-stable Y-type molecular sieve on a dry basis, 10-60% of clay on a dry basis, 1-4% of yttrium on an oxide basis, and 5-35% of a binder on an oxide basis, wherein the rare earth in the rare earth ultra-stable Y-type molecular sieve is calculated by oxide, and the content of the rare earth in the rare earth ultra-stable Y-type molecular sieve is not more than 3% based on 100% of the weight of the catalytic cracking catalyst. According to the present invention, by using the characteristics of small unit cell and more mesopores of the low-content rare earth ultra-stable Y molecular sieve, the yttrium is added on the basis of the low-content rare earth ultra-stable Y molecular sieve, such that the activity stability of the catalyst is good, the mass transfer, the cracking reaction and the selective hydrogen transfer reaction can be easily p