With the rapid development of cities and the growing demand for electricity, it has become imperative to construct an efficient and reliable new power system. As an important support for the construction of a new type of power system, the rationality of the screening of technical standard data sources is crucial. This paper proposes a screening method based on a multi-dimensional evaluation index system, constructing an evaluation system from the dimensions of data quality, relevance, updating frequency and authority, and utilizing the entropy weight method and the Topsis method for comprehensive analysis. The validity of the method is verified through the analysis of examples, aiming to provide reference for the scientific screening of the technical standard data sources of the new urban electric power system, and to help the robust development of the new electric power system.