The invention discloses a fan, comprising a frame body, a rotor rotationally mounted in the frame body, and a plurality of fan blades, wherein a plurality of clamping slots are arranged in the circumferential surface of the rotor along the axial direction, one end of each clamping slot forms an opening in one end surface of the rotor, a mounting part is arranged on one side of each fan blade and can be inserted into the corresponding clamping slot via the corresponding opening, and the rotor is respectively provided with a buckle lug and a fixed part at the two sides of each opening, each fixed part is pivotally connected with a stop part detachably clamped in the corresponding buckle lug, and the mounting part of each fan blade can be stopped in the corresponding clamping slot by the corresponding stop part. The fan blades of the fan are detachably mounted on the rotor and convenient to replace.