Deformation-preventing deep foundation pit supporting structure

The utility model discloses an anti-deformation deep foundation pit supporting structure which comprises a protective plate, two first supporting plates are fixedly connected to the side wall, close to the bottom end, of the protective plate, and two second supporting plates are fixedly connected to the outer side wall, located above the two first supporting plates, of the protective plate. The two first supporting plates and the two second supporting plates are arranged in parallel, a fixing hole is formed in each of the two first supporting plates and the two second supporting plates in a penetrating mode, and two fixing nails are jointly inserted into the four fixing holes. The third supporting plate can support and reinforce the fixing nails, the fixing nails support the upper end and the lower end of the protection plate through the first supporting plate and the second supporting plate correspondingly, and meanwhile the fixing nails are inserted into soil, so that the upper end and the lower end of the