Minimum intervention level decision for historical buildings: historical buildings along the central axis of Beijing, China

Historical buildings are important symbols of urban characteristics and context, and their protection or reuse requires minimal intervention. This article aims to establish a method for selecting the minimum intervention level. Firstly, this study constructed a minimum intervention method selection evaluation framework for historical buildings through literature analysis. Secondly, select 14 historical buildings along the central axis of Beijing. This study uses the Analytic Hierarchy Process to calculate the weights of evaluation indicators. And calculate the minimum intervention selection level through Fuzzy Comprehensive Evaluation. The results showed that 14 historical buildings were divided into four categories in a ratio of 2:1:10:1, and a minimum intervention strategy was proposed. This result also confirms that the intervention methods for 14 historical buildings along the central axis of Beijing are all minimal interventions. The minimum intervention system provides a scientific decision-making framework and basis for the repeated reuse of historical buildings.