The invention discloses a self-adaptive coordinating matching method for a power network frequency modulation mode. The method comprises the following steps: 1, determining initial configuration parameters; 2, setting triggering conditions, namely, triggering a frequency increase event when an AGC (Automatic Gain Control) system monitors that the real-time power network frequency value FAGC is beyond the increase threshold Thda for required frequency modulation and the FAGC is still beyond the threshold after the frequency modulation triggering threshold time Tact; triggering a frequency decrease event when the FAGC is less than the decrease threshold Thdb for required frequency modulation and the FAGC is still less than the threshold after the frequency modulation triggering threshold time Tact; and 3, dynamically adjusting the decrease threshold for required frequency modulation and FnoW based on the frequency fluctuation occurs, and realizing self-adaptive coordinating matching of the frequency modulation mode according to the frequency ranges corresponding to various frequency modulation modes and the Fnow preset frequency modulation mode. With the adoption of the method, the frequency stability can be ensured during frequency modulation under different power network frequency deviation.