The invention discloses a power system stabilizer design method suitable for a double-fed draught fan, and belongs to the technical field of the automatic control of new energy power systems. According to the technical scheme, firstly, nodes and lines of the whole network are numbered uniformly to build a system parameter list; secondly, a double-fed draught fan augmented correlation measuring module is built; thirdly, power system stabilizers under all selected operating points are designed; finally, the module switching weight value is computed and the output of a controller is obtained. The output control signals of the system stabilizers are superimposed on traditional system control signals, the traditional operation habits can be kept, and the advantages of being simple to achieve, low in cost are achieved. By the adoption of the power system stabilizers designed according to the method, the disturbance resisting ability and the fault ride-through ability of the wind farm can be improved, the stability of the power grid is improved, and the wind power using ability of the power grid is improved.