The present disclosure relates to the field of servos, and in particular to a high-precision miniature servo with a new variable reluctance and improved motor positioning. Compared with conventional variable reluctances, the variable reluctance of the present disclosure has a longer service life, is lower in cost and is easier to machine. The motor component is directly assembled on the housing, so that the cost and space are saved, and the difficulty in mounting and positioning a miniature motor is mainly solved. A motor brush piece and the Ball element are directly machined on a PCBA circuit board, so that the problem on the difficulty and cost control of the conventional machining technology is solved.