The" U " shape bending machine, use mainly for in charge of bend the intersection o f " the U " and shaping of shape, process straight electric heat. It is in charge of electric heat to clamp that its design is adopted, press the wheel to rotate along the trajectory, the core of the mould rotates in the centre, making a reservation adopts the encoder to control and rotate the angle, increase and make a reservation along the machinery of moving of trajectory at the same time, make a reservation to protect doubly; Function its have the intersection of quality and kind stability, operation safe and easy to use simple, can realize the characteristic shaped automatically besides putting and fetching the tube.