Bending die for cooling pipe in poloidal field coil support and method of bending die

The invention discloses a bending die for a cooling pipe in a poloidal field coil support. Positioning shaft holes are formed in cooling pipe bending radius round points arranged on a bending bottom plate. Wheels and bending handles are fixedly arranged on the bending bottom plate through positioning shafts via the holes. Stress application bars are arranged in the threaded holes of the bending handles. Four baffles are arranged on the bending bottom plate through screw rods and nuts via gaskets. Two pressing plates are arranged on the bending bottom plate through hexagon socket head cap screws. The cooling pipe drawing is carved on the bending bottom plate, the bending radius round point positions are marked, the threaded holes containing the positioning shafts are drilled and tapped at the positions, where the bending radius round points are arranged, on the bending bottom plate, threaded holes used for installing the four baffles are drilled and tapped, the threaded holes are used for fixing the three bend