Abstract: Distributed generator（DG） and DC power distribution mode provide a new idea for the transformation schemes of urban distribution network（UDN）. It is of great significance to evaluate the UDN transformation schemes scientifically and reasonably.Firstly, a set of index system for comprehensive evaluation of AC/DC transformation of urban distribution network is constructed,and the uncertainty impact of distributed generator configuration is considered. Interval intuitionistic fuzzy numbers are used to describe the decision-making process, and the subjective and objective weight models are respectively used to calculate the index weights, and then solve the comprehensive weights. The improved technique for order preference by similarity to an ideal solution（TOPSIS） is used to determine the scoring method of the transformation schemes. It makes full use of subjective and objective data and solves the fuzzy problem of expert preference in decision-making. The case compares and analyzes the AC/DC transformation schemes of IEEE 33-bus system, and verifies the rationality and feasibility of the proposed method.