The invention discloses a method for transient-state active supporting capacity configuration of a frequency droop control doubly-fed fan. Due to complex external characteristics in coupling of an intrinsic virtual power angle and a rotor speed, an existing doubly-fed fan under frequency droop control is difficulty in reasonable configuration of transient-state active supporting capacity. By analysis of the external characteristics of the frequency droop control doubly-fed fan, a grid frequency related fan virtual power angle-rotating speed characteristic equation is established to further obtain a grid frequency related fan speed balance point, and an expected speed balance point in a transient process is calculated according to fan transient-state active supporting capacity requirements under given frequency fluctuation and then substituted into the virtual power angle-rotating speed characteristic equation to obtain a corresponding droop coefficient set value, so that transient-state active supporting capacity configuration of the frequency droop control doubly-fed fan is realized. By adoption of the method, expected transient-state active supporting capacity of the doubly-fed fan under frequency droop control or virtual synchronizer control is achieved, and system frequency stability is improved.