Foundation pit supporting structure and building foundation pit

The utility model provides a foundation pit supporting structure and a building foundation pit, and relates to the technical field of building construction, the foundation pit supporting structure comprises a center supporting body, a bottom supporting structure and a cable-stayed structure, and the building foundation pit adopts the foundation pit supporting structure. Compared with the prior art, the stress dispersion body is arranged on the outer side of the upper portion of the center supporting body so as to disperse the lateral soil pressure effect of backfill foundation soil on the upper portion of the center supporting body; the bottom supporting structure arranged around the lower portion of the center supporting body can increase the radial depth of the lower portion of the center supporting body so as to disperse the axial extrusion effect of the center supporting body and achieve the purpose of improving the supporting strength of the vertical wall. The cable-stayed structure enables the bottom su