Reusable anchor cable and anchor cable supporting seat in deep foundation pit pile-anchor support

The invention discloses a reusable anchor cable and an anchor cable supporting seat in a deep foundation pit pile-anchor support. The technical problems of how to conveniently adjust the tension angle of the anchor cable and how to reuse a tension supporting seat and the anchor cable are solved. A detachable steel base plate is arranged on the inner side vertical face of a channel steel waist beam on the inner side of a deep foundation pit cast-in-place pile, a hinge base is arranged on the base plate, a swing plate is hinged to the hinge base, an adjustable supporting swing arm is arranged at the lower end of the swing plate, the angle of the swing plate is adjusted by adjusting the supporting swing arm, the swing plate and an anchor cable are perpendicular to each other, and a jack is arranged on the swing plate. The jack is connected with the end part of the anchor cable, so that convenient disassembly and assembly and angle adjustment of the tensioning support are realized; and after the foundation pit is