Abstract: Stud welding is widely used in the production of steel bridge structure. The production quantity of welding stud reaches hundreds of thousands of pieces every year. However, the stud welding has been using manual welding, which shortcoming is bad for environment around, is high of welding labor intensity, is low of welding production efficiency, and is unstable in welding quality. With the continuous development of artificial intelligence and huge investment of innovation, the automation of stud welding production is increasing, and the welding quality stability and welding production efficiency are further improved; but whether manual stud welding or intelligent welding, the stud welding still has some welding defects and welding quality problems. In this paper it summarizes the common welding defects and welding quality problems in the welding test and during welding production, finds and analyzes the causes, and proposes the repair process and quality assurance measures, hoping to further improve the degree of welding intelligence and welding production efficiency, and further strengthen the welding quality management of stud welding during the manufacturing of steel bridge structure.