When transformer windings withstand the shock of continuous change of tremendous electromagnetic force under the impact of short circuit current, transformer may not stably operate and even suffer serious damage. In the light of present situation that the traditional method is difficult to analyze the dynamic process of winding deformation under the mutual influence of magnetic field and structure field, a method of magnetics-structure direct coupled-field method is presented, which is introduced to the dynamic analysis of the process of the transformer winding deformation. Firstly, the magnetic field and structure field coupling characteristics of the transformer are analyzed by ANSYS magnetics-structure direct coupled-field method for a typical 220 kV transformer. Then, in view of the short circuit fault example, the dynamic deformation process of the transformer windings is studied. Finally, in the case of the maximum current moment in the fault example, compared with the static field analysis results, the analysis results are consistent, and the correctness of the method is verified. This method may provide an effective research approach for dynamic analysis of transformer winding deformation process. This work is supported by National Natural Science Foundation of China (No. 51407075).