An antenna protecting device for motor vehicles including a triangular base made of magnetic conducting material, a gourd-shaped container having a small spherical portion at an upper part, a large spherical portion at a lower part, and a neck portion between the small and large spherical portions, the neck portion being rotatably connected with the triangular base, a bracket extending upwardly from a top of the small spherical portion of the gourd-shaped container and having a platform at an upper end, a screw being threadedly engaged with the platform of the bracket and extending downwardly into the spherical portion of the gourd-shaped container, a ball disposed within the small spherical portion of the gourd-shaped container and connected with a lower end of the screw via a chain, a circular seat arranged with a bottom of the large spherical portion of the gourd-shaped container, a magnet fitted in the circular seat, a protective rod fixedly mounted on the platform of the bracket, and an antenna connected with the platform of the bracket.