Abstract: Due to the poor application effect of the current method in the real-time recognition of two-stage dynamic topology of distribution network including DG, the recognition error is relatively large, which cannot achieve the expected recognition effect. Therefore, a two-stage real-time recognition method of dynamic topology of distribution network including DG based on TOPSIS is proposed. Based on the calculation of the phase difference of the distribution network with DG, the initial dynamic topology identification of the distribution network with DG is completed. According to Euclidean distance and Pearson correlation coefficient, the voltage waveform correlation of distribution network with DG is analyzed in the second stage. TOPSIS was used to comprehensively evaluate the output results of phase 1 and Phase 2, identify the dynamic topology change state of distribution network including DG, and realize real-time recognition of the dynamic topology of two-stage distribution network including DG based on TOPSIS. The experimental results show that the identification error of the design method is ±1%, which can realize the accurate real-time identification of the dynamic topology of the distribution network with DG.