The invention provides a variable speed twin-stage axial-flow local fan and relates to an improvement of a structure of a twin-stage axial-flow local fan. The local fan has the advantages of being convenient to use, high in efficiency and wide in application range. The local fan comprises a rack and a motor installed inside the rack, the local fan is structurally characterized in that an output shaft of the motor extends from two ends of the motor, two ends of the output shaft are connected with a first class impeller and a second class impeller, a wind collecting machine is installed on the rack corresponding to the first class impeller, a posterior bite guide is installed on the rack corresponding to the second class impeller, the back portion of the posterior bite guide is provided with a diffuser, and the motor refers to a switch reluctance motor.