Line 4 of Xi'an Metro (Chinese: 西安地铁四号线; pinyin: Xī'ān Dìtiě Sì Hào Xiàn) is a metro line running from north to south, in Xi'an, Shaanxi Province, China.

It was opened on 26 December 2018.

The line is 35.2 km (21.9 mi) in length with 29 stations.

The line is colored Tiffany Blue on system maps.

[2] This Chinese rapid transit article is a stub.