Formwork erecting device and construction method for reverse-construction-method pool wall outer formwork of rotational flow pool

The invention discloses a formwork erecting device and a construction method for a reverse-construction-method pool wall outer formwork of a rotational flow pool. The formwork erecting device is applied to reverse-construction-method construction of the rotational flow pool and comprises a fixing embedded part, an outer formwork assembly, a drag hook fixing rod and an outer formwork assembly. One end of the fixing embedded part is fixed to the bottom of the outer wall of the upper section of the outer cylinder wall, the outer formwork assembly is fixed to the other end of the fixing embedded part, and the outer formwork assembly is vertically and downwards arranged and fixed to a bottom foundation; an inner formwork assembly is arranged on the inner wall of the outer cylinder wall, and the drag hook fixing rod is arranged at the bottom of the inner formwork assembly; and the other end of the drag hook fixing rod is fixed to the outer formwork assembly, and pouring cavities used for pouring concrete are formed