Abstract: Internal inspection data are currently the source of basic data for the integrity management of long distance oil and gas pipelines at home and abroad. The comparison of internal inspection data is the main direction for deep mining and comprehensive utilization of internal inspection data. The development status of internal inspection data comparison at home and abroad was investigated and summarized, and then the main contents of internal inspection data comparison were introduced in detail: comparison of basic information such as girth weld, deformation, metal loss and weld defect comparison, pipeline coordinates. Suggestions on the comparison of internal inspection data were put forward, which has important practical significance for the improvement of theoretical technology.