Foundation pit supporting system and foundation pit supporting method

The invention discloses a foundation pit supporting system which comprises unit supporting folded plates, an extrusion contact frame and a driving frame. An extrusion contact frame is arranged on one surface of the unit supporting folded plate, and the other surface of the unit supporting folded plate is connected with a driving frame; the driving frame is provided with a plurality of sets of unit supporting folded plates, the adjacent unit supporting folded plates are connected with each other, the unit supporting folded plates are also provided with a plurality of sets of extrusion contact frames, and the extrusion contact frames are used for being combined with and abutting against a soil layer on the side wall of a foundation pit. The supporting system has the beneficial effects that the supporting system can support the foundation pit with the building on the periphery and the large sand content, and the supporting efficiency can be improved. 本发明公开了一种基坑支护系统，包括单元支护折板、挤压接触架以及驱动架；所述单元支护折板的一面上设置有挤压接触架，单元支护折板