Abstract: In response to the strong subjectivity of the traditional Analytic Hierarchy Process (AHP) in current railway network security evaluation, this paper constructed a technical evaluation index system for railway network data security from the perspective of technical protection, and proposed a combination weighting method for railway network data security evaluation based on AHP and entropy weight method. The paper effectively mined the objective information of indicator data through entropy weighting method, significantly weakened the influence of subjective factors on the weighting results. The experimental results show that this method can effectively reduce evaluation errors caused by subjective factors, and has reference significance for the evaluation of railway network data security.