The invention discloses an electric heat storage boiler regeneration system used for regulating the peak and belongs to the technical field of power generation equipment. The electric heat storage boiler regeneration system used for regulating the peak comprises a power station boiler, a turbine regenerative extraction system, an electric heat storage boiler, a water-water heat exchanger, a cooling tower circulating water system and a heat supply network connection pipeline. The core of the invention is to provide the electric heat storage boiler regeneration system used for regulating the peak. Surplus generated power in a power plant and abandoned wind power are stored into the electric heat storage boiler in the heating period in winter and are subjected to heat exchange with heat-supply network water to be supplied to a heat user; and when no heat user exists in summer, the deep peak regulation surplus power in the power plant and abandoned wind power in the trough period of a power grid are absorbed. When the power grid is in a peak or normal range, part of cooling tower circulating water is pumped into the electric heat storage boiler to absorb heat, the high-temperature circulating water absorbing heat is subjected to heat exchange with part of condensation water through the water-water heat exchanger, the condensation water is heated to the temperature the same as that of condensation water heated by a lower-pressure heater, stability of the system is ensured, and in this way, the steam extraction capacity of each cylinder is reduced.