SAS cable with stable impedance

The invention provides an SAS cable with stable impedance, which comprises a connector, a cable assembly, a branch connector, a protection assembly and a limiting assembly, and is characterized in that two independent core wires are physically connected into a whole through an insulation fixing layer by utilizing a process of an extrusion die, so that the phenomenon that when the SAS cable is bent, the branch connector is damaged is avoided; the distance between the two core wires changes, the impedance stability of the SAS cable is greatly improved by keeping the stable distance between the two core wires, and when the nylon woven meshes are in a wet state, the SAS cable is prevented from being in the wet state for a long time by intensively stacking the nylon woven meshes, pressing the outer ring of the nylon woven meshes, absorbing water and wiping the water on the surface of the SAS cable to be dry, so that the service life of the SAS cable is prolonged, and the service life of the SAS cable is prolonged.