The invention belongs to the field of power systems, and particularly relates to an implementation method for identifying oscillation, which is triggered by a generator speed regulating system, of a power system based on an integration algorithm for moment resolution. The implementation method includes computing mechanical power deviation delta PM; determining speed deviation delta omega of the generator; and judging whether the speed regulating system of a unit provides positive damping or negative damping to a certain oscillation mode in an interconnected power grid by means of calculating quadrant of an integration value of the mechanical power deviation delta PM of the generator and the speed deviation delta omega of the generator. Fitting calculation for a regulating valve signal of the speed regulating system and an original prime mover model is carried out, and a calculation result is subtracted by an average mechanical power value of a generator to obtain the mechanical power deviation delta PM of the generator; and frequency of internal electromotive force EQ of the generator is calculated to obtain the speed deviation delta omega of the generator. The method has the advantages that measurement is convenient and accurate, whether the certain generator speed regulating system provides the positive damping or the negative damping to the certain oscillation mode can be simply and clearly identified, and accordingly measures are quickly taken to suppress oscillation caused by a speed regulator.