The invention relates to a production method for lowering the contents of sulfur and alkene in gasoline; alkadiene is firstly removed from the raw material of FCC gasoline by a pre-hydrogenation reactor, then the FCC gasoline enters a fractionating tower and is cut and fractionated into light gasoline and heavy gasoline, the light gasoline is adsorbed and desulfurized, the heavy gasoline enters aselective hydrogenation and desulphurization reactor, selective hydrogenation and desulphurization is carried out on the heavy gasoline, organic sulfide and part of the alkene in the heavy gasoline are removed, then a reaction effluent enters a hydrogenation and modification reactor and is hydrogenized and modified, the content of the alkene is lowered, and the heavy gasoline after being modifiedand the light gasoline are blended by an adsorption and desulphurization product or the light gasoline is blended by the adsorption and desulphurization product or the treatment of the process flows of adsorption and desulphurization is carried out after the heavy gasoline and the light gasoline are mixed with light gasoline obtained after cutting and fractionation to obtain clean gasoline meeting the standard requirements; and the process flows are flexible and can be flexibly regulated, the utilization of heat is reasonable, the production meets European IV and compromises European V clean gasoline, the selective deep hydrogenation and desulphurization and the alkene content reduction can be achieved, and the aims of reducing the loss of the octane value and having higher liquid yield can also be achieved.