Low-sulphur gasoline cleaner production method

Disclosed is a low-sulphur gasoline cleaner production method. A full-range gasoline raw material is fed into a first hydrogenation reactor to touch and react with selective-hydrogenation dienes-removal catalyst to obtain a reaction effluent, the reaction effluent directly enters a second hydrogenation reactor to touch a selective hydrodesulfurization catalyst I, and a reaction effluent of the second hydrogenation reaction is subjected to fractional distilation to obtain light-fraction gasoline and heavy-fraction gasoline; further, the heavy-fraction gasoline is fed into a third hydrogenationreactor to touch and react with a selective hydrodesulfurization catalyst II, a reaction effluent of the third hydrogenation reactor is separated to obtain hydrogenated heavy-fraction gasoline, and finally, the light-fraction gasoline is mixed with the hydrogenated heavy-fraction gasoline to obtain the full-range gasoline product. The method can be used for treating high-sulphur high-olefin catalytically cracked gasoline