Cold bending machine, also known as arch bending machine, can be divided into ordinary cold bending machine and CNC cold bending machine. Cold bending machine is a new type of equipment for processing and manufacturing tunnel support steel arches. It consists of six parts: base, mechanical transmission, cold bending system, hydraulic system, electrical control system and auxiliary system. Cold bending machine is one of the main equipment used in construction sites in my country. The development of my country's machinery and equipment, through the painstaking research of many talents, continuous innovation and improvement, and the developed machinery and equipment are sold to all parts of the world. Cold bending machines occupy a great position in the construction of steel arch structures. Many construction sites have spent countless manpower, financial and material resources due to the processing of steel, and wasted countless resources before the construction can be successful. The cold bending machine has solved some construction problems to a large extent.