According to the influence of the dynamic process of stator excitation current on the transient characteristics of doubly-fed induction generator (DIFG), this paper, on the basis of traditional control strategy, analyzes the change process of fault stator excitation current and its effect on DIFG’s transient characteristics, establishes the DIFG control model including the dynamic process of stator excitation current. This paper compares the traditional control strategy with improved control strategy on the simulation platform of PSCAD/EMTDC. The results show that the improved control strategy can suppress the fluctuation of rotor-side current more effectively under grid voltage fault, and enhance uninterrupted operation capacity and transient stability. By simulation, the correctness and validity of the control strategy are proved.