According to the processing material, precision requirements and operation mode, stretch bending machines are mainly divided into three types, suitable for different production scenarios. First, the hydraulic stretch bending machine, which has sufficient power and convenient operation, is suitable for bending medium and thick-walled profiles and large radians, and is widely used in construction and pipeline fields; second, the CNC stretch bending machine, which adopts digital control, has high positioning accuracy and high automation, and can realize precise reproduction of complex radians, suitable for high-end manufacturing such as aerospace and automobiles; third, the manual stretch bending machine, which has a simple structure and low cost, is suitable for small-batch and simple profile stretch bending operations, and is mostly used in small processing plants or maintenance scenarios.