Coaxial cable

The utility model discloses a coaxial cable, include: inner conductor, combination formula insulator, outer conductor, inner sheath, weaving layer and the oversheath of coaxial setting in proper order from inside to outside, wherein, combination formula insulator includes: interior thin layer, foaming layer and the outer thin layer of closely laminating and setting up in proper order from inside to outside, the foaming layer adopts the polyethylene to adopt the foaming to make, interior thin layer with the inner conductor is closely laminated. The utility model discloses a set up the insulating layer into the combination formula, the thin layer is closely laminated with the inner conductor in utilizing, avoids the inner conductor to expose the oxidation because of the surface, and the foaming layer is avoided making up the formula insulator and is taken place to break away from after buckling, straighten many times with the inner conductor as the buffering in the middle of simultaneously, and outer thin layer