Underground engineering slip casing anchorge cable

The invention discloses a underground injecting anchor rope which features that it includes multiple section air core tube, bracing wire and tow sleeve mechanism, the tow sleeve mechanism is a sleeve with exterior tow, there is a center hole and surrounding holes on inner surface of the tow sleeve insert the tail tube into the center hole and process with rough head on each wire at the end and insert to every surrounding holes, clinching an air core hexagonal bolts to the tailing tube after fasten a nut on it, sleeve stand ring to middle and head tubes while fix each wire to the open ring holes on the stand ring, set certain space between the tubes and link them together with the wires and then weld the head tube and the wire front terminal and process to a double skew surface. The advantages of the invention are that the anchor rod can bent which is not restrained by narrow space when drilling.