High-strength and large-pore-volume catalytic cracking aid and preparation method thereof

The invention discloses a high-strength large-pore-volume catalytic cracking aid and a preparation method thereof, the catalytic cracking aid comprises a molecular sieve, a matrix, a binder and a metal chelate, the matrix is composed of a gamma-alumina precursor with a peptizing index less than or equal to 50% and clay, and the binder is prepared from a phosphorus-containing compound and an aluminum-containing compound; the molecular sieve has an MFI structure, and the molecular sieve of which the pore diameter is less than 0.7 nm accounts for 50-100 wt% of the total amount of the molecular sieve; the binder and the metal chelate and the matrix are mixed in a high shear emulsifier. According to the catalytic cracking aid provided by the invention, all the components are matched with one another, and all the components are dispersed and emulsified by adopting a high-shear emulsifier in the preparation process, so that the catalytic cracking aid can still maintain excellent abrasive resistance on the premise of