The utility model relates to a square steel waterwall for underground continuous wall, its characterized in that the square steel waterwall comprises box and at least one baffle, the cross sectional shape of box is for invering the U type, the baffle set up in the inside in the inversion U type space of box, the bottom both sides of box with the baffle forms the recess, recess size and the cast -in -place big or small adaptation of annotating the base. The utility model discloses an advantage does: make construction pipeline commonly used become in good order, the convenience is installed anddemolishs to the weight loss, circulated use is compared through the cost, and the square steel waterwall utilizes alright saving cost more than 2 times, matter hard can be eliminated conventional concrete waterwall truncation and fallen the angle phenomenon.