Abstract: In order to make the airborne conformal array have better multi-path suppression ability and improve the communication quality, it is necessary to carry out beamforming research in combination with the complex multi-path channel to earth. In this paper, the adaptation of multipath channels was analyzed from typical scenes such as offshore mountains, tropical oceans and complex mountains, and the modeling of high-speed multipath channels to ground was completed. Then, a conformal array antenna model was established which is suitable for airborne environment, and the polarization and aperture effects were fully considered. Finally, the receiving LSMI beamforming simulation was carried out under the narrowband assumption, and the received beam pattern and beam scanning results of the multi-path channel array were obtained, and the performance was compared with that of non-multi-path and conventional array conditions. The results show that the complex multipath channel of airborne to ground communication can significantly weaken the performance of conformal array filtering in airspace, resulting in at least 3dB performance degradation.