Abstract: Forming of pipeline big data is an irresistible trend, while the inline inspection data of pipelines are major part of such big data. In this paper, the inline inspection data model of pipeline under the environment of big data is established, and the management process of such inline inspection data is streamlined. Moreover, the in-depth research and application of inline inspection data are discussed under the environment of big data, mainly including: comparison of data obtained from multiple inline inspection, comparison of data obtained from inline and external inspections, accurate locating of pipeline and its application in daily pipeline management, maintenance and repair, and geoinformation system, as well as evaluation on pipeline reliability and safety. In this way, the pipeline management level can be effectively enhanced to ensure the safe and reliable operation of pipelines.