Abstract: Quantitative research on carbon emissions of urban rail transit infrastructure has become a focal point in the field of low-carbon construction in transportation. This study provides a systematic review and analysis of the quantitative research on carbon emissions of urban rail transit infrastructure, based on the Web of Science (WOS) core database and the China National Knowledge Infrastructure (CNKI) database. This literature review delves into research methods and influencing factors, covering four types of infrastructure: subway systems (including tunnels and stations), light rail systems, urban rapid transit systems, and tram systems. Firstly, the research methods, objectives and scope definition, functional units and inventory data of the literature on carbon emission calculation are compared, the scope of application of the research methods is determined, and the data sources are classified. Secondly,the key factors affecting the embodied carbon emissions of urban rail transit infrastructure are identified and analyzed.Finally, discuss the shortcomings of existing research. The research results provide reference for the standardization of carbon emission accounting for urban rail transit infrastructure.