Simple foundation pit protection formwork

The utility model discloses a simple foundation pit protection formwork, and particularly relates to the technical field of foundation pit protection, the simple foundation pit protection formwork comprises a two-way screw rod, two sides of the two-way screw rod are respectively provided with a supporting assembly, each supporting assembly comprises a first folding plate arranged on the side face of the two-way screw rod, and the first folding plate is movably connected with a second folding plate through a shaft pin. The supporting assembly is arranged, the first folding plate, the second folding plate and the extension plate are unfolded, so that the first top plate and the second top plate are close to the foundation pit, the first top plate and the second top plate are firmly attached to the inner wall of the foundation pit, and the function of protecting the foundation pit is achieved; the shaft pin bases at the ends of the first folding plate and the second folding plate can be close to each other, then