There are few studies on dual-polarization antennas with reverse cross-eye, on the basis of distinguishing the polarization reception mode of radar which can and cannot be detected, how to choose dual-polarization antenna theoretically. On the basis of the vertical decomposition of double-noise signal, the interference electric field of the two-point source is modeled, and the selection of the polarized antenna is simulated and verified. Simulation results show that, this study has higher theoretical and practical reference value, it can lay a foundation for further research of dual-polarization antenna.