The machine is an efficient processing machine which is specially designed to bend I steel, U steel, flat beam, solid bar, etc. It has three working rollers, the positions of the two bottom rollers can be adjusted along the arc. Assisting rollers are installed on both sides of the machine to control the work quality in the bending of proportional steel sections. The machine is reliable to operate with various functions and is an ideal bending machine thats adjustable and able to deal with different types of materials and specifications only by recombining the die settings. This removes the need to change dies. The machine offers high flexibility and reliability with low cost.