Aimed to the request of antiship missile terminal guidance radar polarization antijamming test, researching on variable polarization simulation method with RF simulation array system. This paper suggested a new method of targets full polarization echoes simulation. It’s completely considered the inference of moving targets to polarization characteristics, and correctly described targets such as missile and plane polarization scatter characteristics in moving state. According to this method, the full polarimetric echo simulation of a typical ship target is carried out by using Simulink. The simulation results show that the variation of echo of horizontal and vertical polarization channels is consistent with the observed data. The study results can directly applied on equipment building and test work, provided theoretical basis and technical support.