Method and device for catalytic cracking of oxygen-containing silicon-based high-boiling residue

The invention provides a method and device for catalytic cracking of an oxygen-containing silicon-based high-boiling residue, and the method comprises the following steps: adding a high-boiling residue raw material, a reducing agent and a reduction catalyst into a reactor to carry out a reduction reaction, and after the reduction reaction is completed, feeding the reacted high-boiling residue raw material, a chlorine source and a cracking catalyst into the reactor to carry out a cracking reaction; wherein the reduction catalyst is high-entropy alloy powder; the skeleton of the cracking catalyst is a porous material, and the functional group of the cracking catalyst comprises at least one of amide group, cyano group, ester group, pyrrole, pyrazole, pyridine and thiazole. The invention provides a method for firstly carrying out catalytic reduction and then carrying out catalytic cracking, when the method is applied to catalytic cracking of the high-boiling-point substances (especially oxygen-containing silicon-