The invention discloses a recovery adjustment calculation method for power flow unsolvability. With respect to a power flow unsolvability section, an adjustable generator or a reducible load node is set to form an adjustment control direction, an adjustment step length minimization model of power flow unsolvability recovery is established, and a minimum control adjusting quantity for recovering to a tide soluble domain in the designated adjustment direction is calculated on the basis of an optimal multiplier Newton power flow method. According to the method, the convergent solution closest to the current running mode is obtained in the set adjustment direction for the power flow unsolvability section, so the function is easy to realize; manually setting the adjustment direction is consistent with the actual running mode of a power system, so the method has a good application prospect as technical extension and functional maturation of power flow calculation.