The invention relates to a catalytic
cracking catalyst and a preparation method. The catalytic
cracking catalyst contains a
cracking activity component, a mesoporous
silicon-aluminum material, clay and an
adhesive, wherein the cracking activity component comprises a rare-earth Y-type
molecular sieve; and the rare-earth content in the Y-type
molecular sieve is 10-25 wt% on the basis of rare-earth oxides, the
cell constant is 2.440-2.472nm, the
crystallinity is 35-65%, the
silicon / aluminum
atomic ratio in the framework is 2.5-5.0, and the product of the ratio (I1 / I2) of 2theta=11.8+ / -0.1 degree
peak intensity I1 to 2theta=12.3+ / -0.1 degree
peak intensity I2 in an X-
ray diffraction pattern and the rare-earth weight percent in the
molecular sieve on the basis of rare-earth oxides is greater than 50. The preparation method comprises the following steps: preparing a mixed
slurry containing the cracking activity component, mesoporous
silicon-aluminum material,
adhesive and clay, and carrying out
spray drying. Compared with the prior art, the rare-earth-containing Y-type molecular
sieve is matched with the mesoporous silicon-aluminum material, so that the catalyst has higher thermal and hydrothermal stability and higher heavy oil cracking capacity, and can reduce the consumption of the molecular sieves in the catalyst, thereby lowering the catalyst production cost.