Line 6 of the Chengdu Metro (Chinese: 成都地铁6号线; pinyin: Chéngdū Dìtiě Liù Hào Xiàn) is a rapid transit line in Chengdu. It starts at Wangcong Temple and ends at Lanjiagou. The total length is 68.223 km (42.4 mi)^[2] with 56 stations.

Line 6's color is brown. The line began construction in 2016 and was opened on 18 December 2020.^[1][3] Line 6 uses high capacity 8-car Type A trains.^[4] Line 6 became the longest stretch of subway to be opened at once in China^[5] and since its opening, Line 6 is currently the longest continuous subway tunnel in the world.

• 2017-03-01, the first tunnel boring machine was launched. 42 TBMs will be used simultaneously for the construction of the line.^[6]

• 2019-10-07, tunnel construction completed for Line 6.^[7]

• 2020-05-27, as Phase 3 section of Line 6 finishes track-laying, other Phase 1 and 2 sections officially started testing rolling stock.^[8]

• 2020-07-01, the last section of Line 6, between Xihua Avenue station and Dongguang station, is powered on, paving the way for dynamic testing.^[8]

• 2020-12-18, Line 6 officially opened.^[9][10][11]
• 2024-04-08, Qingdao Road station opened for service.^[12]

• Chengdu Metro
• Chengdu
• Urban rail transit in China