Abstract: In order to improve the reliability of oil pipeline network during its daily operation, it is necessary to master the running situations of all kinds of instruments, identify the weak links in the daily operation of the pipeline, and normalize the management of equipment and facilities.In this paper, statistical analysis was conducted on the non-scheduled shutdown of the oil pipelines under the jurisdiction of the PetroChina Pipeline Company during recent 4 years.It is indicated that the main reasons for the non-scheduled shutdown are auto-control communication failure, equipment failure and external electric failure.In addition, human misoperation is an important factor that shall not be ignored.Then, the specific causes of non-scheduled shutdown were analyzed thoroughly, and the measures to reduce the non-scheduled shutdown were put forward correspondingly.It provides the basis for the safe and smooth operation of oil pipelines.Finally, it was recommended to strictly implement the assessment of non-scheduled shutdown in the production management and attach importance to non-scheduled shutdown of pipelines.