Abstract: The electromagnetic environment of intelligent connected vehicles is complex and dynamic, and electromagnetic interference is easy to radiate through glass to affect the normal operation of integrated electronic equipment. In this paper, a PET-micro copper mesh-PET stacked frequency selective surface is proposed and placed in a two-layer glass interlayer. The unit structure consists of three octagonal rings of different sizes and a four-arrow-like ring. The simulation results show that the structure forms three passbands and the minimum insertion loss in the band is less than 0.3 dB. The maximum oblique incidence angle to maintain the electromagnetic stability response can reach 70°. The electric field of the central control position is detected in three cases: no window glass, only window glass and loading design structure, and its electromagnetic shielding effectiveness is tested. Finally, the array of 15×15 units is processed, and the S parameters are tested by vector network analyzer. The test results are basically consistent with the simulation, which shows that the designed frequency selective surface has practical application value in electromagnetic shielding.