The utility model provides a gasoline hydrogenation device stabilizes fuel system, the noncondensable gas of in with air cooler enters a circulating water cooling ware, and the former pipeline noncondensable gas breaks off after incorporating fuel air line single current valve into, and set gradually cooler, whirl and take off hydrocarbon jar, desulfurizing tower, whirl deamination jar, booster compressor, poor ammoniacal liquor jar, the 2nd circulative cooling ware, cyclone separator, steam heater, membrane separator behind a circulating water cooling ware, the utility model has the advantages of reasonable in design, simple structure, effectively eliminate gasoline hydrogenation device and distillate fractionally overhead gas looks component and change and influence the heating furnace and operate quality and safety and the environmental protection risk of bringing, can popularize and apply the gasoline hydrogenation device field.