The invention relates to the field of refining of hydrocarbon materials, and discloses a gasoline deep-desulfurization method and a gasoline deep-desulfurization device. The method comprises the following steps: (1) contacting a gasoline raw material with an oxidant in the presence of an oxidize-deodorizing catalyst; (2) fractionating the oxidized and deodorized gasoline raw material; (3) carryingout solvent extraction on a light fraction and an extracting solvent to carry out solvent extraction in order to obtain a sulfur-containing solvent and a solvent-extracted light fraction, and separating the sulfur-containing solvent and sulfides in the sulfur-containing solvent through distillation to obtain an extracted sulfur-containing material and a sulfides-removed recovered solvent; (4) contacting a heavy fraction with a hydrodesulfurization catalyst to obtain a hydrogenated heavy fraction; and (5) mixing the hydrogenated heavy fraction with the solvent-extracted light fraction obtainedto obtain a gasoline product. The method allows the low-sulfur gasoline product to be obtained on the premise of avoiding great loss of the octane number.