A hot metal desulphurization stir head is provided, the invention relates to a stir head for using hot metal stirring desulphurization out of furnace before steelmaking in revolver. For solving problems of stir head with short service life in present technique, the invention provides a hot metal desulphurization stir head with air cooled paddle metal core, which is characterized in: setting a outlet for air cooled gas on lower end of the metal stir shaft, paddle metal core is hollow and fixed connects with the outlet; also including air cooled junction part with cavity, connecting outer edge of lower end thereof with inner margin of paddle metal core lower end, seting lower end of air cooled tube in the cavity of the air cooled junction part; setting a paddle air cooled tube under paddle metal core cavity. When using, cooled air flows successfuly in metal core of stir head, distributing uniformly to decrease working temperature of paddle metal core when desulphurizing and slowing stirhead wornbreakage progress; prolong service life of stir head greatly.