This invention relates to a self-support railway digital signal cable, which includes cable core, insulating wrapping strip that covers the cable core, jacket cover that outside the insulating wrapping strip, wherein the cable core includes the multi-groups signal wire, the jacket cover felts with the gallus, and the gallus is fixed with the steel hank. When installing span, fixing the two ends of the steel hank directly on the electrical pole, then the cable is installed completely, this installation is shortcut and convenient, which can be used in various environments without steel hank and cable pothook, especially to the slope, bridge, riverway, gorge, highway and so on.