The utility model relates to a filling head, which additionally comprises an air valve seat, an air valve core and an air valve stem. The lower end of the air valve stem is exposed below the air outlet of the air valve seat. The air valve core is connected with the lower end of the air valve stem. The upper end of a liquid valve stem is connected with the air valve core. Therefore, through a driving mechanism, when a liquid valve is opened, an air valve is closed at the same time. In the same way, when the liquid valve is closed, an air valve is opened at the same time. As a result, the air filling operation is further performed after the liquid filling operation. Since no expensive solenoid valve is adopted by the filling head, the manufacturing cost is lowered. The opening / closing of an air valve and a liquid valve can be realized through a driving mechanism without complex synchronization control, so that the filling head is more simple and easier to control. In addition, a liquid valve seat is provided with detachable upper and lower parts, so that the liquid valve seat can be cleaned more cleanly and thoroughly. Therefore, the filling head is better in cleaning effect.