Efficient and energy-saving axial flow fan

The utility model belongs to the technical field of axial flow fans, and particularly relates to a high-efficiency and energy-saving axial flow fan which comprises a fan barrel, and the fan barrel comprises an air inlet, an air outlet and a channel communicated between the air inlet and the air outlet. And the driving assembly comprises a motor body, a plurality of fixing pieces and a control module, and the motor body is installed in the center of the fan barrel through the multiple fixing pieces and located between the air inlet and the air outlet. According to the efficient and energy-saving axial flow fan, the relative mounting positions of the motor body and the fan barrel are fixed through the fixing piece, and the proportion of the area, located on the channel in the axial direction, of the driving assembly to the area, located on the channel in the axial direction of the fan barrel, of the channel is limited, so that the driving assembly occupies a small space in the channel; and under the same output