Method for increasing yield of benzene through combined processing

The invention relates to a combined processing high-yield benzene production method, which comprises: carrying out a pre-hydrogenation reaction on raw material oil, and carrying out first separation on at least a part of the obtained pre-hydrogenation reaction product to obtain C6-7 naphtha and C7 + naphtha; the method comprises the following steps: carrying out aromatization reaction on C6-7 naphtha to obtain aromatized hydrogen and first benzene-rich aromatic hydrocarbon; carrying out reforming treatment on the C7 + naphtha, and separating to obtain reformed C6-7 naphtha, reformed C8 aromatic hydrocarbon, C9 + aromatic hydrocarbon and heavy aromatic hydrocarbon; the C9 < + > aromatic hydrocarbon enters an aromatic hydrocarbon dealkylation device to be subjected to dealkylation treatment, and second benzene-rich aromatic hydrocarbon is obtained; the first benzene-rich aromatic hydrocarbon, the reformed C6-7 naphtha and the second benzene-rich aromatic hydrocarbon enter an aromatic hydrocarbon extraction devi