The present invention provides a dynamic balancing ring for a cutter holder for balancing the cutter holder. The dynamic balancing ring includes a circle, plural fixing elements and an adjusting element. The plural fixing elements are used for fixing the circle on the cutter holder, and after the center-of-gravity position of the cutter holder is obtained by dynamic balance corrector, the adjusting element can be installed at a position on the circle corresponding to the center-of-gravity position, and through adjusting the adjusting element, the dynamic balance of the cutter holder can be corrected. For using the dynamic balancing ring for the cutter holder according to the present invention, it is convenient that the dynamic balancing ring can be directly installed on the cutter holder, which is needed to be corrected, without additional processing.