Energy-saving type self-rotating efficient axial flow fan

The invention discloses an energy-saving type self-rotating efficient axial flow fan, and particularly relates to the technical field of axial flow fans, the energy-saving type self-rotating efficient axial flow fan comprises a round through machine shell, a support is fixedly connected to the inner wall of the round through machine shell, and a first motor is fixedly connected to one side of the support. When the axial flow fan is used, objects attached to the surface of the filter screen can be cleaned by the brush, so that the filter screen is not easy to block, air in an air inlet on one side of a round shell on the axial flow fan is not ventilated, and the use condition of the axial flow fan is influenced; by arranging the detachable device, the cleaning device can be detached from the round through machine shell so as to be conveniently maintained and overhauled; and by arranging the collecting device, a collecting box is fixedly installed on the outer surface of the bottom of the circular ring block, w