The utility model relates to an equalizing ring for a triplet strain insulator-string, which belongs to a metal component for arranging a power transmission line. The equalizing ring comprises a circular ring which is formed by bending and welding a tube, wherein the circular ring consists of a left ring tube and a right ring tube, which are symmetric to each other, a gap is arranged between the left ring tube and the right ring tube, and both the left ring tube and the right ring tube are connected with a double-leg bracket. The equalizing ring has the characteristics of stable structure, high mechanical strength and convenience in installation and use.