Tiantongyuandong station () is an interchange station between Line 17 and Line 18 of the Beijing Subway. The Line 17 station opened on December 30, 2023, becoming the fourth subway station within Tiantongyuan area. Line 18 opened at this station on December 27, 2025.
The station is located under the interchange between Baifang Road (ç½åÂÂè·¯) and Beiyuan East Road (Ã¥ÂÂèÂÂä¸Âè·¯) on the border between Tiantongyuanbei Subdistrict and Tiantongyuannan Subdistrict, in Changping, Beijing.
The Line 17 station has 2 underground island platforms and 4 tracks, with a total length of 555.9 metres and a total width of the main structure of 45.3 metres. The Line 18 station has a separate underground island platform.
When the station initially opened, there were 5 exits, lettered A, B, C, D<sub>1</sub> and D<sub>2</sub>. All of them led to Beiyuan East Road. When the Line 18 station opened, Exits E and F opened, which led to Baifang Road. Exit C and E are accessible via elevators.
The structure of the station was completed in early 2022.
The station is planned to be the interchange station with Line 18 and main line and branch line of Line 17, with the former having opened on December 27, 2025.