Abstract: Objective Traditional hydraulic automatic hot melt welding machine needs to be improved because of problems such as large volume, large weight, high energy consumption and environmental pollution. With the rapid progress of servo technology, modern servo motors can provide higher torque, while having excellent control accuracy, operating stability and overload capacity. Compared with traditional hydraulic press, servo motor has obvious advantages of small size, light weight, energy saving and environmental protection. At present, in many applications, servo motors have gradually replaced traditional hydraulic press and become a new generation of power sources. Therefore, traditional hydraulic automatic hot melt welding machine can be improved and developed based on servo motor, and PE tube automatic hot melt welding machine based on servo motor have significant differences to original hydraulic automatic hot melt welding machine in the equipment structure, power conversion mode and control mode, which need to re-develop its control system. Methods According to this requirement, the system developed in this paper adopted Kunlun on-state embedded industrial touch screen as the main control device, and servo system, hot plate lifting system and temperature acquisition and control system were built on this basis. Finally, the corresponding control software was designed according to characteristics of the system. Results A new welding process that was more suitable for the equipment was also proposed in this paper. Conclusion Through many welding tests and tensile experiments, the control system could make automatic hot melt welding machine based on servo motor carry out welding of PE pipe qualified PE pipe according to the standard process and new process, and when the new process was used for welding, it could reduce the use of low energy consumption and extend service life of the equipment.