The invention discloses a double-fed fan crowbar adaptive cut-out control method for preventing repeated switching of a crowbar. The method comprises the following steps of: when an amplitude of a rotor current exceeds an operating value of a crowbar at the side of the rotor, placing the crowbar and simultaneously, locking a converter at the side of the rotor; if the rotor current is smaller than the operating value of the crowbar, calculating a rotor current maximum value which is to be generated when assuming that the crowbar is cut out at a current moment, and when the rotor current maximum value is smaller than the operating value of the crowbar, cutting out the crowbar and recovering working of the converter at the side of the rotor; and in a fault period, setting a q-axis component of the rotor current according to a preferred output reactive power of a double-fed wind driven generator, and enabling reference values of d-axis and q-axis components of the rotor current to meet constraint conditions. According to the double-fed fan crowbar adaptive cut-out control method disclosed by the invention, the crowbar is guaranteed to be cut out as soon as possible in the premise that the crowbar cannot be placed, so that placing time of the crowbar is shortened and effects that a slave system absorbs the reactive power a little and safety influence on a fan and a control device thereof is reduced are achieved.