The invention relates to a light and stable-phase radio frequency cable. The structure of the light and stable-phase radio frequency cable comprises a conductor, an insulation layer, an external conductor, a shielding layer and a sheath, wherein the insulation layer is arranged outside the conductor, the external conductor is arranged outside the insulation layer, the shielding layer is arranged outside the external conductor, and the sheath is arranged outside the shielding layer. The fabrication method of the light and stable-phase radio frequency cable comprises the following steps of 1) selecting the conductor; 2) wrapping the insulation layer by a concentric wrapping machine; 3) taking a wrapping silver-plated copper strip as the external conductor after wrapping of the insulation layer; 4) braiding the shielding layer by employing a silver-plated copper-coated aluminum alloy wire; and 5) extruding PFA or FEP as the cable sheath. The light and stable-phase radio frequency cable has the advantages of light weight, high cutoff frequency, low loss, stable phase, high- and low-temperature resistance and the like, and can be used for a long time within a range of -65 DEG C to +165DEG C.