The Sech'Ã Ân Line is an electrified long railway line of the Korean State Railway in North Korea, connecting Sinhakpo on the Hambuk Line with Chungbong.
The line was opened in 1920 by the privately owned Tomun Railway, at the same time as the rest of the first stage of its mainline, from Hoeryà Âng to Sangsambong. It was subsequently nationalised by the Chosen Government Railway in 1929, and from 1934 to 1940 it was managed by the South Manchuria Railway. Finally, after the partition of Korea it became part of the Korean State Railway.
Coal is shipped from mines on this line to the Kim Chaek Iron & Steel Complex at Kimchaek and the Ch'à Ângjin Steel Works in Ch'à Ângjin, and there are commuter trains that operate between Hoeryà Âng and Sech'à Ân via Sinhakp'o.
A yellow background in the "Distance" box indicates that section of the line is not electrified.