In recent years, with the frequent occurrence of domestic pipeline accidents, the quality problems of pipeline girth welds have become a major hidden danger in pipeline safety production. Therefore, the Safety Committee Office of the State Council and the group company have successively issued documents to check the girth welds of the existing pipelines and control the hidden dangers. According to the relevant work requirements, in 2019, the pipeline company needs to excavate and verify 2620 welded junctions in total. By the end of June, the pipeline company has only completed 33% of the whole year's work, and the work progress is slow. In this paper, through the analysis of the defect repair time of each branch of the pipeline company, the ability model of girth weld defect repair of the pipeline company is established, the factors that restrict the progress of girth weld work are analyzed, and corresponding suggestions are put forward to provide reference and decision-making basis for similar projects in the future.