A waterfall decorative humidifier, including mainly a housing, a water exit on top of the housing, a water sub-receptacle in the lower portion of the housing, a water pump in the water sub-receptacle, and a fan in the housing; in which the water pump is connected with the water exit through a water pipe, and in which the housing is generally of the shape of a waterfall; wherein at least one shaft is provided on the housing, and a decoration is connected to the shaft directly or through a mechanism.