The utility model relates to a finned pipe and a heat taking device out of the finned pipe, which belongs to the technical field of heat exchange, and solves the problems that both ends of a fin and the bottom of a dilatation joint U-shaped groove are easily cracked when an existing cannula type finned heat transfer pipe adopts a heat taking device out of the finned pipe of a longitudinal long fin and is used to catalyze conversion devices. The finned pipe is formed by a base tube (10) and fins (11) which are arranged on the outer surface of the base tube, are vertical to the outer surface of the base tube and are longitudinally arranged. The fin is a full-length fin, whose both ends are low fins (112), height is 18-24mm, middle portion is a high fin (111) and height is 28-30mm. Both ends of two adjacent fins are arranged on the axial direction of the base tube in a crossing way. A cannula type finned heat transfer pipe is arranged in the heat taking device out of the finned pipe, and the finned type of the steam cannula adopts the finned pipe with the above structure. The utility model can be used in heavy oil fluidizing, catalyzing and cracking devices in petroleum processing industry.