The invention provides a pipeline cable conveying method with an auxiliary supporting structure and belongs to the technical field of pipeline cables. The pipeline cable conveying method is completedby means of a cable conveying device, the cable conveying device comprises a horizontal drilling machine, a cable is fixedly connected with a drilling rod of the horizontal drilling machine, and the cable is fixedly sleeved with spiral blades. The spiral blades comprise blade roots and blade tips fixedly connected with the blade roots, the cross sections of the blade tips are circular, and the ratio of the thickness L of the blade roots to the diameter D of the blade tips is 1:(1-1.2). A spiral pipeline cable conveying structure is formed through the cable by means of driving of the horizontaldrilling machine and further comprises a supporting frame provided with a travelling mechanism and arranged between the drilling rod and a pipeline and a cable groove formed in the supporting frame,and a shaft roller for bearing the cable is arranged in the cable groove. On the basis of the spiral pipeline cable conveying structure, in the process that the cable is spirally conveyed to the otherend of the pipeline by means of the horizontal drilling machine, the pipeline is filled with plugging particles finally. According to the pipeline cable conveying method, the cable and the plugging particles can be easily, rapidly, and synchronously conveyed in place in good condition.