Gasoline and preparation method thereof

The invention provides a gasoline and a preparation method thereof. The preparation method comprises the following steps: 1, carrying out physical desulphurization and denitrification treatment on direct coal liquefaction naphtha to obtain a purified product; 2, fractioning the purified product to obtain a C6- product and a C7+ product; 3, carrying out a reforming reaction on the C7+ product to obtain mixed aromatic hydrocarbons, and separating the mixed aromatic hydrocarbons to obtain a reformed gasoline blend product; and 4, mixing 40-51 parts by weight of the reformed gasoline blend product, 20-35 parts by weight of mixed C5 and 20-30 parts by weight of the C6- product to obtain the gasoline. A physical desulphurization and denitrification technology adopted in the invention has the advantages of simple operation, low cost and low energy consumption. The reformed gasoline blend product, the mixed C5 and the C6- product are mixed according to a specific weight ratio, so increase of the octane number of the gasoline is facilitated, and the vehicle gasoline produced in the invention has the advantages of low emission, high calorific value and high quality.