Steel plate column cofferdam

The utility model provides a steel plate column cofferdam, which belongs to the technical field of cofferdams and is provided with a plurality of steel plate piles, the steel plate piles are sequentially connected to form a rectangular cofferdam, surrounding purlins are arranged on the inner side of the cofferdam along the circumference and tightly attached to the steel plate piles, and a main supporting beam is arranged between the two sides of the inner side of each surrounding purlin. The main supporting beams are fixed to the enclosing purlins through bolts, inclined supporting beams are connected between the main supporting beams and the enclosing purlins, the inclined supporting beams are fixedly connected with the enclosing purlins and the main supporting beams through bolts, a supporting frame is further arranged on the outer side of the cofferdam and comprises outer cross beams and supporting beams, the outer cross beams are arranged on the outer side of the cofferdam, and the supporting beams are ar