This document aims to achieve metadata-led railway infrastructure data delivery and service release, and combines the application needs of the railway industry with reference to "Geographic Information Metadata" (GB/T19710-2005) and "Rail Transit Geographic Information Data Specification" ( GB/T37120-2018) and other national and industry standards, combined with the "Railway Infrastructure Metadata Standard" (T/CRBIM014-2019) compiled by the alliance in 2019, and revised and compiled by applying relevant experience and results in railway engineering. This document consists of 6 chapters, including: general principles, terminology and symbols, metadata structure, metadata content, metadata extension, and consistency check.