The rotating platform and the antennaarray are two main parts of RadioFrequency (RF) Simulation Test System.The error of RF Simulation Test System is represented by the angle simulation precision of the antennaarraywhich may be influenced by the error of the rotating platform and the incoincidence between the rotating platform center and the spherical center of the antennaarray.The mathematic models of static and dynamic error of the rotating platform are analyzed and calculated out based on the operational principle of the antennaarray and motion performance of the rotating platform.Finallythe simulation results about rotating platforms effects on the angle simulation precision of the antennaarray angle are presented.