Light gasoline desulfurization technology uses extraction technology and special solvents. The solvent ratio is small and the olefin extraction rate is low; 35% of the middle distillate gasoline is extracted to remove organic sulfur. The sulfur content of the product gasoline is less than 10ppm, and there is no octane number. At the same time, the gasoline feed load of the hydrogenation unit is reduced by 1/3, the hydrogen consumption is reduced by 25%, and the octane loss of the full-distillate gasoline is reduced from 3.5 to 1.0.