The invention discloses an intelligent cable for in-pipeline detectors and a processing method thereof. By adding an intelligent junction part to the intelligent cable and arranging a junction circuitboard in the intelligent junction part, a multi-split structure design is completed, that is, one output cable corresponds to multiple probe input cables. The problem of wiring difficulty caused by the limited volume of an in-pipeline detector is solved. A process combining hot vulcanization with cold vulcanization is adopted in the processing method provided by the invention, which enables the cable not only to resist oil pressure or air pressure of 10MPa, but also to work in an environment from -20 to 80 DEG C. The cable has advantages such as reasonable design, convenient use and long service life.