Foundation pit supporting steel formwork

The invention discloses a foundation pit supporting steel formwork, and belongs to the technical field of foundation pit supporting equipment. The problems that a traditional foundation pit supporting structure is prone to slipping, unstable in supporting and inconvenient to mount and dismount in the supporting process are solved. The device comprises a main supporting plate and an inclined support which are hinged, an auxiliary supporting plate is arranged on the supporting face of the main supporting plate in a sliding mode, a second pin wedged into the pit bottom is fixedly connected to the bottom of the auxiliary supporting plate, and a plurality of insertion teeth with inclined upward vertex angles are arranged on the face, abutting against the side wall of a foundation pit, of the auxiliary supporting plate. The inclined supporting assembly comprises a telescopic accessory with one end hinged to the auxiliary supporting plate and an inclined inserting positioning accessory connected with the other end o