Foundation pit excavation supporting device for civil construction

The utility model discloses a foundation pit excavation supporting device for civil construction, and relates to the technical field of civil construction. According to the technical scheme, the device comprises a base and a supporting plate, the base and the supporting plate are connected through a triangular connecting plate, the triangular connecting plate is rotationally connected with the supporting plate and the base, a pair of sliding rails is fixedly connected to the side, adjacent to the base, of the supporting plate, and sliding blocks are slidably connected to the sliding rails; a threaded rod is inserted into one side of the triangular connecting plate and fixedly connected with the triangular connecting plate, the threaded rod is sleeved with a pressing rod and slidably connected with the pressing rod, the two ends of the pressing rod are slidably connected with the sliding blocks, and the projection of the axis of the pressing rod on the base is parallel to the axis of the sliding rail. The end