Hydraulic bending machine is mainly composed of frame, stroke adjustment, front support, back gauge, mold, electrical system, hydraulic system and other parts. The hydraulic press brake machine has a simple structure and good rigidity. It is equipped with upper and lower molds of different shapes, which can bend workpieces of various shapes with high efficiency and high precision, and has high production efficiency. The oil cylinders on both sides of hydraulic press brake machine directly drive the sliding block to work, and it adopts electrical-hydraulic control, which can perform single, continuous, jog and halfway stop operations, and it is easy to realize automatic operation.