The distinguishing features of welding and control method of welding deformation for welding of H section steel are introduced. The welding condition of automatic submerged arc welding with flux backing is determined by the test of welding technology. 介绍了H型钢的焊接特点及焊接变形的控制方法,并通过焊接工艺试验确定了带焊剂垫埋弧自动焊的焊接工艺参数。