The invention discloses a tensile high-frequency multi-core cable and a preparation method thereof. The cable comprises a cable core formed by twisting a plurality of
coaxial cable cores, a fluororesin wrapping tape layer, a
copper-plastic composite tape wrapping shielding layer and an outer sheath, wherein the
coaxial cable core comprises an inner conductor and a cable core body formed by concentrically twisting a plurality of PFA resin filling wires, an inner insulating layer, a
metal winding shielding layer, a
metal weaving shielding layer and an outer insulating layer sequentially coat theouter portion of the wire core body, the inner conductor is formed by twisting plural strands of wires, the stranded wire is formed by crossly and spirally twisting a plurality of tinned
copper monofilaments with a
diameter of 0.02-0.03 mm, the
metal winding shielding layer is formed by spirally winding
copper alloy wires in one direction, the metal weaving shielding layer is formed by spirally winding and weaving double-layer tinned copper wires in opposite directions, and the double-layer tinned copper wires are coated with lubricating oil. The cable has good tensile strength, flexibility,bending resistance and torsion resistance, and is not easy to break, small in high-frequency
signal attenuation and durable in use.