Pipeline combined coaxial cable and making method thereof

The invention relates to a pipeline combined coaxial cable and a making method thereof. The invention aims to provide a cable having the characteristics of simple structure, novel design and convenient maintenance and update and a method having the characteristics of simple process and reliable product quality. According to the technical scheme, the pipeline combined coaxial cable comprises a main cable and an auxiliary cable, wherein the outer sheath of the main cable and the sheath of the auxiliary cable are connected as a whole. The pipeline combined coaxial cable is characterized in that the cable further comprises a tubular hollow pipe parallel to the coaxial cable, and the hollow pipe and the outer sheath of the main cable are connected as a whole. The making method of the pipeline combined coaxial cable comprises the following steps: (1) a main cable and an auxiliary cable are paid off through a pay-off rack, and extend into a sheath mold of an extruder; (2) the cable core hole of the sheath mold is ke