Abstract: Due to the limited peak regulation capacity of thermal power units in North China and the small ratio of hydropower units conducive to peak regulation, the problem of peak regulation of the power grid has become increasingly prominent with the rapid growth of renewable energy capacity. The devices of load-side resources such as electric vehicles, distributed energy storage and electric heating have the characteristics of adjustable charging power and time which can have large potential to participate in power grid optimization control. Combined with the structure and load characteristics of North China power grid, the rules for a thirdparty independent entity participating in peak regulation auxiliary service market of North China are designed. The principles and methods for load-side resources participating in the declaration, clearing, settlement and apportionment in the provincial peak regulation market are proposed. Also, how the load-side resources participate in the inter-provincial peak regulation market is discussed. The pilot operation carried out by Beijing-Tianjin-North Hebei power grid of China shows that the load-side resources guided by the market mechanism have changed the characteristic of"inverse peak shaving", which has effectively improved the peak shaving capacity of the power grid and promoted the consumption of renewable energy.