It is one of two parallel lines in Central Taiwan, passing the inland area and Downtown Taichung.

It has a total length of 85.5 km (53.1 mi), all of which is double track.

Long tunnels were built to reduce the grade of the line.

The section between Fengyuan and Daqing was rebuilt as an elevated line in 2016.

Five new stations were added in 2018: Lilin, Toujiacuo, Songzhu, Jingwu, and Wuquan.