Method and system for producing vehicle gasoline blending component with low sulfur and low olefin content

The invention relates to the technical field of gasoline preparation, in particular to a method and a system for producing a low-sulfur low-olefin-content automotive gasoline blending component. The method comprises the following steps: carrying out a pre-hydrogenation reaction on catalytically cracked gasoline and hydrogen, and then carrying out separation and cutting to obtain light gasoline and heavy gasoline; the heavy gasoline is heated; the heated heavy gasoline is subjected to a hydro-upgrading olefin reduction reaction, and modified heavy gasoline is obtained; carrying out hydrodesulfurization reaction on the modified heavy gasoline to obtain target heavy gasoline; obtaining a vehicle gasoline blending component from the target heavy gasoline and light gasoline; the hydrodesulfurization reaction is completed while olefin saturation is reduced as much as possible, so that the product quality meets the requirement of producing standard motor gasoline, the sulfur content can meet the quality requirement