Combined processing technology for catalytic cracking gasoline desulfurization

The invention provides a combined processing technology for catalytic cracking gasoline desulfurization. The combined processing technology comprises the following steps: cutting catalytic cracking gasoline into light-component gasoline and heavy-component gasoline at a temperature of 80-90 DEG C under a pressure of 0.07-0.20 MPa, feeding the light-component gasoline into an extraction refining device and carrying out alkali liquor extraction desulfurization, and feeding the heavy-component gasoline into an adsorption desulfurization device and carrying out adsorption desulfurization; and combining the desulfurized refined light-component gasoline and the desulfurized refined heavy-component gasoline to obtain a gasoline product with a sulfur content of not more than 10 ppm. According to the invention, the gasoline product obtained by the combined processing technology is ultralow in sulfur content, and the octane number of the gasoline product is reduced to less than 0.5 unit and evenlower than 0.5 unit comp