Process for producing high-octane gasoline through raw material rich in C4, C5 and C6 alkane

The invention provides a process for producing a high-octane gasoline component. The process comprises the following steps of: mixing enriched C4, C5 and C6 alkane with hydrogen; feeding the mixture into a reactor containing a dehydrogenation catalyst and performing an alkane dehydrogenation reaction; treating a dehydrogenation product through a non-condensable gas separating device; then mixing with a raw material rich in alkane; and then transferring the mixture into a reactor containing an aromatization catalyst and aromizing to produce a low-benzene high-octane gasoline component rich in aromatic hydrocarbon. The modified gasoline is high in content of non-benzenoid aromatics, lower in content of benzene and low in content of olefin.