The utility model belongs to the technical field of oil-gas field gathering and transportation equipment, and relates to a sliding rail for a fire barrel type indirect heating furnace. The sliding rail comprises a rail supporting piece, a sliding rail supporting piece and a rail, wherein the sliding rail supporting piece is arranged on the rail supporting piece; the rail is arranged on the rail supporting piece; at least two rows of ball shafts are fixedly arranged on the rail; a plurality of balls are arranged on the rail through one respective roller shaft; and each set of sliding rails at least comprises two groups of rails, and balls and ball shafts which are arranged on the rails. The fire barrel type sliding rail is convenient for disassembling, maintaining and replacing a fire barrel and a heat exchanging device.