Line B1 of Tianjin Metro is an under construction metro line serving Tianjin, China. The Phase 1 Northern section of Line B1 is spanning 22.5 km long, with a total investment of 21.89 billion RMB. Line B1 is known as the "north-south central axis" of Binhai New Area, spanning 31.5 km with all 22 stations underground and a total investment of 27.6 billion RMB. Line B1 is scheduled to commence operation by the end of 2026.
As of March 2025, the main structures of 16 stations have been completed, 13 out of 19 stations is connected.
History Construction of Line B1 was kicked off on 23 February 2016.
On 25 October 2024, Tianjin Metro began receiving their first rolling stock set of Line B1.
On 31 October 2024, the right shield underground section from Yushandao Station to Xinbeilu Station was completed.
On 9 March 2025, the section from Yushandao station to Chezhanbeilu station was completed.
On 12 January 2026, the underground section from Xinjiayuanxi Station to Guoxiangxidao Station was successfully connected.
On 3 June 2026, the underground section from Xinjiayuandong Station to Tanggu Station was completed.
Stations All 22 stations are underground. Station name Transfer Distance Location Binhai New Area
Rolling stocks Line B1 uses 30 sets of rolling stocks which are type 6A and were produced by CRRC Tangshan, with an estimated value of 1.1 billion RMB. This will mark the first line of Tianjin Metro system to use A-type high capacity rolling stock instead of ordinary B-type.
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