Foundation pit supporting steel support anti-falling structure

The utility model provides an anti-falling structure for a foundation pit supporting steel support. Comprising a foundation pit bottom plate, a plurality of cast-in-situ bored piles arranged at the bottom of the side edge of the foundation pit bottom plate at intervals, steel bar sets, steel enclosing purlins, steel supports, steel grooves and steel wire rope sleeves. The steel bar set comprises a plurality of steel bars arranged in the foundation pit bottom plate at intervals, and the ends of the steel bars extend out of the side edge of the foundation pit bottom plate. One side of the steel enclosing purlin is connected with the side part of each cast-in-situ bored pile, and the other side of the steel enclosing purlin is connected with the end part of the steel support; the steel tank is connected with the end part of each reinforcing steel bar; one end of the steel wire rope sleeve is sleeved on the steel bar group between the steel tank and the foundation pit bottom plate, and the other end of the steel