The Pingxi Line (Chinese: 平溪線; pinyin: Píngxī Xiàn; Wade–Giles: P'ing²-hsi¹ Hsien⁴; Pe̍h-ōe-jī: Pêng-khe Soàⁿ) is a 12.9 km long, single-track railway branch line of the Taiwan Railways Administration. It runs through Ruifang and Pingxi Districts in New Taipei City.

The railroad was originally built to transport coal. It was completed in July 1921, during Japanese rule.

All trains have through service to the Yilan Line. Most trains terminate at either Houtong or Ruifang. Other trains go as far as Badu.