Abstract: The computer simulation technology has been widely used in the pipeline design, operating management and staffs training in the pipeline industry. It is the key to develop accurate mathematics model and find the solution to it (simulation engine), for operating situation of oil pipeline, whether it can been simulated correctly. In order to develop the computer simulation training system of Daqing-Tieling oil pipeline, the mathematics models suited to Daqing-Tiel-ing oil pipeline has been built. The paper has introduced the process of the design and the actualization of computer simulation system for Daqing-Tieling oil pipeline. The design of the simulation engine is the theoretical foundation to develop on-line simulation software of pipeline.