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In order to accurately establish the simulation model of electric vibration table, to understand the characteristics of electric shaking table system. Author firstly analyzes the mathematics model of the electrodynamic shaker, and secondly uses the advanced Moving-Horizon recursive least squares algorithm (MRLS) to determine the electrodynamic shaker system order and time delay and estimate the parameters of the system. Finally the ARAM model of the electrodynamic shaker is built. In this paper end, the identification result of a electrodynamic shaker with empty table and another electrodynamic shaker with slip table is given and is verified by making sine sweep vibration tests. The result shows that MRLS algorithm has a good identification capability and strong robustness for the high order line system.