This machine is mainly composed of the main transmission mechanism, mandrel mechanism, ejecting mechanism, clamping mechanism, trolley feeding device, servo rotation device, electrical system and hydraulic system. During operation, the motor drives the oil pump to rotate to supply pressure oil; parameters are set via the touch screen, and the microcomputer (PLC) sends instructions to control the opening and closing of each solenoid valve. This enables each oil cylinder to act in a certain sequence and regularity, so as to achieve the purpose of bending spatial three-dimensional pipes with high precision.