Hydrocarbon oil conversion method

The present invention relates to the technical field of catalytic conversion of hydrocarbon oil in the absence of hydrogen, and discloses a hydrocarbon oil conversion method which comprises the steps: (1) carrying out a catalytic cracking reaction on a hydrogenation catalytic diesel oil raw material and a catalyst in a first reaction zone to obtain a material flow I, the first reaction zone containing a riser reactor; (2) introducing a transalkylation agent and the material flow I into a second reaction zone for transalkylation reaction to obtain a material flow II; and (3) separating the material flow II to obtain reaction oil gas and a spent catalyst. According to the method provided by the invention, firstly, the reduction effect of the hydrogenated catalytic diesel oil is obvious and can reach 70% or above of the handling capacity of the hydrogenated diesel oil raw material, namely, the conversion rate of the hydrogenated catalytic diesel oil is high; secondly, the content of aromatic hydrocarbon in gasol