Relay pipeline capable of increasing heat conduction area for fresh air system

The invention discloses a relay pipeline capable of increasing the heat conduction area for a fresh air system, and relates to the technical field of pipe fittings, the relay pipeline comprises a relay pipe, a plurality of through holes are formed in the outer wall of the relay pipe, heat conduction pipes are fixedly connected to the inner walls of the through holes in a sealed mode, and a fixing plate is fixedly connected to the interior of each heat conduction pipe; a threaded rod is rotationally connected between the fixing plate and the inner wall of one side of the heat conduction pipe, one side of the threaded rod extends into the relay pipe, the outer wall of each heat conduction pipe is connected with a plurality of sets of fins in a sealed and sliding mode, and a threaded sleeve is arranged on one side of each set of fins. According to the invention, the plurality of heat conduction pipes are arranged on the relay pipe, heat can enter the heat conduction pipes when heat is introduced into the relay p