Soil fixing device for foundation pit construction

The soil fixing device comprises a soil retaining plate, a groove is formed in the top of the soil retaining plate, a screw tube is arranged on the lower surface of the soil retaining plate, a cavity is formed in the soil retaining plate, a tube hole is formed in the inner bottom wall of the groove, and a concave block is fixedly installed on the right side of the soil retaining plate. The bottom of one soil retaining plate is inserted into the groove of the other soil retaining plate, then the square pipe is rotated according to the terrain of the foundation pit, the limiting strips on the square pipe make contact with the inner wall of the foundation pit through the fixing nails, one side of the inclined plate makes contact with the inner wall of the foundation pit, and the square pipe extrudes the inserting rods on the limiting plates to be connected with the soil retaining plates in an inserted mode. The fixing plate on the supporting plate is fixedly connected with the inner bottom wall of the foundation