The invention discloses a high-frequency transmission cable, and the cable comprises a conductor, an insulating coating layer, a polyolefin resin layer, and a shielding layer. The periphery of a conductor is wrapped by the insulating coating layer, and the insulating coating layer is disposed on the insulating coating layer in a bonding manner through one first low-dielectric adhesive layer. The shielding layer is disposed on the polyolefin resin layer through the other first low-dielectric adhesive layer. The thickness of the polyolefin resin layer is greater than zero and less than 100 microns. The first low-dielectric adhesive layers have a dielectric constant less than three and a loss factor less than 0.01. According to the design, the cable can achieve high-quality high-frequency transmission, and can meet the requirements of the thinning development.