Abstract: The development is described in of the tight-line operation in Tieling-Qinhuangdao pipeline which is a breakthrough pipeline operation in China. Based on the field tests and theoretical studies, the effect of transient flow and surge pressure on the pipeline operation conditions are analyzed. A simulation model is presented and verified together with measurements of the apparatus chracteristics, controls and adjustments of upset conditions, safety operation and computerized monjtoringf A multitask computer developed, Thies system is quite successful in practical application, software system is