Foundation pit supporting device

The utility model discloses a foundation pit supporting device which comprises a supporting plate mechanism and a movable supporting mechanism, the movable supporting mechanism is arranged between every two sets of plate blocks of the supporting plate mechanism in a supporting mode, the supporting plate mechanism comprises a U-shaped plate, a side sealing plate A, a side sealing plate B, a pile pipe and a hanging buckle plate, the side sealing plate A and the side sealing plate B are symmetrically welded to the U-shaped faces of the two sides of the U-shaped plate, and the side sealing plate A and the side sealing plate B are symmetrically welded to the U-shaped faces of the two sides of the U-shaped plate. The supporting plate mechanism and the movable supporting mechanism are arranged to form the foundation pit supporting device, when the foundation pit is supported, the plate body of the supporting plate mechanism can be inserted into the foundation pit, and concrete can be poured into the plate body of th