The work aims to analyze the relationship between rail trains and urban culture, promote the cultural connotation of the exterior of air rail trains, and provide reference for the exterior design and evaluation of air rail trains. Taking the exterior design of an A-type air rail train as an example, an approach of exterior design for an air rail train that integrate feature semantics and fuzzy hierarchy analysis was proposed. Based on fuzzy hierarchy analysis, a multi-level evaluation model and judgment matrix was built from the three criteria layers of nationality, regionality and epochal character. Professional designers were invited to evaluate the weight of evaluation indicators. Finally, the exterior design scheme of an air rail train was evaluated. Based on the semantic index weight analysis results, the Blue Throated Sunbird was effectively integrated as a characteristic cultural element into the design. The feasibility of the method was verified by user evaluation. This method helps to identify the importance ranking of various indicators in the exterior design of an air rail train. The limitations of the scheme are discussed, and suggestions for further optimization of design are provided, providing reference for improving the cultural connotation of air rail train appearance design.