Provided is a modeling method for a double-fed wind turbine generator electromechanical transient model. The method comprises the steps that an initial model is built according to a physical structure and design parameters in a double-fed wind turbine generator; actual measurement identification is conducted on model parameters with the high identification degree in the initial model, and fitting identification is conducted on model parameters with the low identification degree in the initial model; the final model is built according to the actual measurement identification and fitting identification results. According to the modeling method for the double-fed wind turbine generator electromechanical transient model, the problem that the double-fed wind turbine generator is lack of calculation model parameters adapting to the actual situation is solved, by means of actual measurement identification and fitting identification, the model parameters, with high accuracy, of a current system can be obtained, a system model is built by means of the obtained model parameters, the reliability of the system model is high, and a powerful support is provided for safe and stable operation of a power grid.