The utility model discloses a high-precision fire bending device. Including a base, a double-shaft motor is arranged in the middle of the upper surface of the base. Fixing plates are symmetrically welded to the two sides of the upper surface of the base. output shafts at the two ends of the double-shaft motor are connected with screw rods; one end of the screw rod is rotationally mounted on the fixed plate; the screw rod is in threaded connection with a nut block; a mounting plate is welded to the side wall, away from the base, of the nut block. Bending plates are hinged to the tops of the side walls, close to each other, of the two mounting plates, supporting plates are welded to the two sides of the upper surface of the base, air cylinders are mounted on the side walls, close to each other, of the two supporting plates, piston rods of the air cylinders are connected with electric clamps, and a top plate is fixed between the tops of the side walls, close to each other, of the two supporting plates. The bending device is simple in structure, novel in design, high in applicability and worthy of popularization, bending precision is guaranteed, the bending effect is good, the situations of excessive bending and insufficient bending are avoided, and different angles can be bent.