Line 8 of the Tianjin Metro (Chinese: 天津地铁8号线; pinyin: Tiānjīn Dìtiě Bā Hào Xiàn) is a rapid transit line running from northwest to southeast Tianjin.

The Phase I south section of line 8, which was originally called Line 6 Phase 2 during construction, was opened on 28 December 2021.

[1] The line is currently 13.42 km long and has 9 stations.

This is the first metro line in Tianjin that uses Type A six car, GoA4 automated trains.

(1st section)