Abstract: With the improvement of design level of steel tower and the increase of structural steel production, steelconcrete composite structure steel towers are favored by designers. According to the force requirement of steel tower of bridge, while saving steel and manufacturing cost, some bridges use steel-concrete composite tower of thin-wall structure. However, there is still relatively little research on the manufacturing and assembly process of thin-walled steel tower wall panel units, and it is urgent to solve the problems of welding deformation and docking accuracy of thin-walled steel tower panel units. According to the structural characteristics and manufacturing process requirements of the steel tower of Shiziyang Bridge, the manufacturing process of its steel shell plate element is deeply studied in the paper. Through the use of numerical control laser cutting, research on reserved variables for external dimensions of steel plate cutting, sanding the vacuum cart equipment, intelligent shear nail welding robot system and other technologies and equipment, some breakthroughs in the manufacturing technology of thin-wall steel tower panel unit are achieved. In the process of studying the manufacturing process, a series of process optimization measures are put forward by analyzing the key control points of thin-walled panel unit manufacturing.