The invention relates to a small-interference stable damping enhanced control method for a double-fed fan. A method for introducing an additional damping item related to a power grid frequency is adopted for increasing the damping of a double-fed fan system; a virtual power angle-rotating speed balancing point and a synchronous stability margin of the double-fed fan are not influenced by the additional damping item; the system damping weakening of the double-fed fan caused by the droop coefficient configured for meeting the synchronous stability margin can be avoided; the double-fed fan under the frequency droop control or virtual synchronous machine control has the expected synchronous stability margin and the expected damping characteristics; the dynamic performance and the stability of the power grid can be improved.