京九黄河特大桥采用了整体节点新技术，该节点焊缝密集，其中不等厚板对接焊缝、棱角焊缝为我国桥梁首次采用，由于焊缝要求高，加大了焊接难度。本文通过选择合理的焊接工艺，确保了焊接接头的力学性能，消除了高温裂纹、咬肉及成形不良等缺陷，解决了长焊缝熔深不足和烧穿同时产生的难题，较好地控制了焊接变形，保证了焊接质量和工期 Beijing-Kowloon Yellow River Bridge uses a whole new node technology, the node weld-intensive, ranging from thick butt welds, angular welds for the first time in our bridge, due to the high requirements of the weld, increased welding difficulty. In this paper, by choosing a reasonable welding process to ensure the mechanical properties of the welded joints, eliminating the high temperature cracks, biting and poor forming defects such as welding to solve the lack of deep penetration and burn through at the same time produce the problem, a better control of Welding deformation, to ensure the quality and duration of welding