The invention provides a method for identifying parameters of controllers of a DFIG (doubly-fed induction generator). According to a signal transfer relation among all controllers of a DFIG converter, disturbance is applied to a measurement signal for the input end of each controller through a step identification method to highlight the action of each controller under the disturbance of the measurement signal, so that the parameters of each controller are identified. The disturbance is applied to the measurement signal for the subsequent controller of two cascaded controllers, and meanwhile, the change of the measurement signal for the previous controller is shielded to decouple the parameters of the two controllers, so that the parameters of each PI (proportional-integral) controller can be individually identified under the condition that a controller circuit is not transformed. Through repeated iterative identification methods, the problem of low parameter identification accuracy is solved.