Abstract: The influence of magnetized stratified plasma sheath on the propagation characteristics of oblique electromagnetic waves is analyzed by the hybrid matrix method. The variation of transmission coefficient of electromagnetic wave with frequency under magnetic field and the polarization characteristics of electromagnetic wave with different incident angles under magnetic field are calculated respectively. Taking the GPS navigation right hand circularly polarized wave as an example, the influence of magnetic field and electron density on the right-hand circular polarization(RCP) electromagnetic wave is studied. The results show that the magnetic field can move the stop-band of the right-handed circular polarization wave towards the high frequency direction in the plasma. In addition, the magnetic field can improve the polarization characteristic of the circular polarization wave at oblique incidence to some extent, which is beneficial to the reception of the GPS signal.