The utility model discloses a shower nozzle of molten salt furnace flue gas desulfurization system washing section, including the shower nozzle, spraying branch pipe, above -mentioned shower nozzle includes the minor air cell, the large aperture nozzle, a water inlet, flange, the inside minor air cell that sets up of above -mentioned shower nozzle, above -mentioned minor air cell one side sets upthe large aperture nozzle, the water inlet is seted up to above -mentioned minor air cell lateral wall, above -mentioned water inlet one side sets up flange, above -mentioned spraying branch pipe endsets up mounting flange, above -mentioned flange and mounting flange interfitting, it is less because of spraying the aperture to solve spiral nozzle, very easily by the impurity of fritter in solution jam shower nozzle and because of the insecure problem of different material objects bonding.