Rotation positioning structure of micromotor rotor

The invention relates to a rotation positioning structure of a micromotor rotor. The rotation positioning structure comprises a frame body, a magnet and a rotation piece, the frame body is provided with a bifurcated part, and a magnet arranged on the bifurcated part surrounds a rotor pole of the inserted rotor; the upper side and the lower side of the frame body are provided with open slots for sliding insertion of the rotor optical axis. The width of each open slot is slightly larger than the axis diameter of the rotor optical axis. The autorotation piece is arranged at the joint of the bifurcation parts, a fine eccentric distance is formed between the axis of a rotor optical axis inserted into the rotor and the axis of the autorotation piece, and the inserted rotor is attracted by the magnet to approach close forwards and touch the autorotation piece to form a structure that a rotating body of the autorotation piece rotates and the inserted rotor rotates automatically; and when the rotor optical axis is ins