Top beam, cover beam top intelligent welding production line, including 48 intelligent welding workstations, through the workshop information system and the production line docking, through the workpiece production plan and workpiece automatic identification system, intelligent call welding procedures. Equipped with large tonnage head and tail frame shifter, automatic clamping equipment, improve loading efficiency and reduce welding deformation, as well as high-precision arc tracking system, multi-layer and multi-channel adaptive channeling system, efficient welding process, superior welding ability of medium and thick plate, the welding reachability rate reaches more than 80%, all welds meet the grade weld standard. Equipped with off-line programming software to achieve modular programming and reduce the programming workload of multi-specification workpieces.