The invention relates to a superflexible aluminum outer conductor radio frequency coaxial cable, and belongs to the technical field of coaxial cables. The superflexible aluminum outer conductor radio frequency coaxial cable comprises an inner conductor, an insulation layer and an outer conductor which are sequentially connected in a sleeved mode from inside to outside, the axis of the inner conductor is overlapped with that of the outer conductor, a through vacant space is formed in the inner conductor in the normal direction of the cross section, a supporting part is arranged in the vacant space, and the supporting part is an elastic rodlike object; the insulation layer adopts an insulation medium winding the outer surface of the inner conductor in a spiral mode, and the insulation medium forms an insulation layer spiral thread; the insulation layer at least comprises an exposed part on the outer surface of the inner conductor; the insulation layer is wrapped by the outer conductor, and the outer conductor spiral thread is formed in the outer conductor. The coaxial cable has a good bendable property and low dissipation of a signal.