With the increasing grid-connected capacity of wind power generation, the frequency regulation capacity provided by traditional energy sources can no longer meet the needs of system frequency regulation. The current policy allows wind power to participate in system frequency regulation, but the existing frequency regulation auxiliary service mechanism cannot effectively measure the true capacity of wind power participating in frequency regulation, which brings severe challenges to the safe and stable operation of the system. On the basis of the existing frequency regulation auxiliary service mechanism, this paper introduces the wind power frequency regulation credibility index and the comprehensive frequency regulation performance index to adjust the quotations of the main bodies of the frequency regulation market to measure the true capacity of wind power participation in frequency regulation, and at the same time optimizes the compensation detail rules of the existing frequency regulation auxiliary service mechanism. For the above optimization part, the clearing model of wind power participation in the frequency regulation market is established. The results of the example show that the optimized mechanism can effectively measure the true frequency regulation capacity provided by wind power, and promote prioritizing the clearing of high-quality frequency regulation resources. Meanwhile, wind power can improve the frequency regulation credibility index and the comprehensive frequency regulation performance index to obtain higher frequency regulation income.