Foundation pit external corner anchor cable supporting structure

The utility model discloses a foundation pit external corner anchor cable supporting structure. The foundation pit external corner anchor cable supporting structure mainly comprises a new bottom plate, joint bars, a first anchor cable and a second anchor cable. During construction, mechanical equipment and construction materials enter a site, after foundation pit supporting pile construction is completed, a new bottom plate is additionally constructed on an existing building bottom plate, and the new bottom plate and an old bottom plate are connected through joint bars; then, anchor hole positioning is carried out on a top beam of the supporting pile and an inclined supporting position of a bottom plate outer frame, and the anchor cable position is determined; then, a drilling machine is in place, drilling is conducted in sequence, then pre-stressed anchor cables are installed, and the stress of the anchor cables is adjusted through a pre-tensioning or repeated tensioning method; thirdly, after the anchor cab