The utility model discloses a multifunctional fan relates to public transit facility field. Multifunctional fan, including the cylinder, set up the draw -in groove on the cylinder, the draw -in groove is convex, the cylinder both ends set up the connecting rod, the connecting rod is kept away from cylinder one end and is set up the base, set up the motor in the base, installation fan piece on the output shaft of motor, the fan piece is a plurality of, fan piece top sets up the protection casing, fixed connection can be dismantled with the base to the protection casing, the motor all is located the protection casing with the fan piece, set up a plurality of through -holes on the protection casing. The utility model has the advantages of the utility model discloses not only can let the working clan at the rest that can sit down on the way on and off duty, reduce burden uses as fan and notebook computer radiator, uses in a flexible way moreover, and it is convenient to adjust.