HM series geomembrane welding machine is a new type of welding machine, which can meet the different thickness of geomembrane welding and is suitable for the welding of PE, PVC, HDPE, EVA, PP and other hot melt materials. The temperature control part of this series welding machine adopts automatic constant temperature control: high control precision and small temperature fluctuation. Speed control adopts automatic voltage and speed control circuit: DC servo motor drive. Large output torque, smooth walking. It can maintain a constant speed during climbing, vertical crawling and changes in road load. This series of welding machine has stable working performance and is not affected by external temperature and voltage changes. This series of welding machine has excellent performance, easy operation, high welding efficiency and good welding quality. Widely used in highways, tunnels, reservoirs, building waterproofing and other projects.