The invention relates to a treating method for gasoline. The treating method comprises the following steps: cutting a raw gasoline material so as to obtain a light gasoline fraction and a heavy gasoline fraction; subjecting the light gasoline fraction to etherification so as to obtain etherified oil; and conveying the heavy gasoline fraction to a fluidization reactor for contacting with a mixed catalyst and carrying out desulphurization and aromatization in the presence of hydrogen so as to obtain a heavy gasoline product, wherein the mixed catalyst comprises an adsorption desulphurization catalyst and an olefin aromatization catalyst, the content of an inactivator in the olefin aromatization catalyst is 0.1 to 5.0 wt% on the basis of the weight of the olefin aromatization catalyst, and the inactivator is at least one element selected from a group consisting of carbon, sulfur and nitrogen. The method provided by the invention can reduce the contents of sulfur and olefins in gasoline, increase the octane number of the gasoline and maintain high gasoline yield.