Abstract: The online real-time monitoring system and offline training model for Yan'an-Xi'an Products Pipeline are built by using SPS dynamical simulation software from GL Company. It is required to obtain the key data from SCADA system to drive the model in the online real-time system. The SPS online simulation is based on the "black box" theory. It makes use of the discharge pressure, suction pressure, flow rate, temperature and other data to do the hydraulic simulation. The simulation results can be used for instrument analysis, leak detection and location, pig tracing, prediction of pressure, temperature and flow rate at any point of the pipeline. The online real-time simulation can provide advice for the starting/shutting down operation, and it is a valuable reference to understand the pipeline hydraulics.