The present invention provides a film antenna assembly and a fabrication method thereof. The assembly includes an antenna body, which is a conducting body placed onto the substrate. The antenna body is provided with a signal connector, a feeder, and a conducting medium. One side of the conducting medium is coupled with the feeder, and the other side is located on the signal connector of antenna body. With this combined structure of the feeder, the film antenna assembly could be protected against damage, and the stable electrical connection resolves the coupling issue of the film antenna and feeder for improved applicability and economic efficiency.