The invention relates to a base-station forwarding multi-antenna processing method concerning wireless physical layer safety. A multi-antenna uplink receiving matrix and a downlink transmitting pre-coding matrix of a base station are used for reducing the risk of the eavesdropping of private information between a transmitter and a receiver. The method effectively inhibits malicious eavesdropping behaviors of a malicious eavesdropper through increasing number of base station side antennas. In an actual scene, the private information is transmitted through a base station relay, and the base station can obtain the statistical information of an eavesdropping channel in the actual scene, thereby reducing the outage probability of safety transmission between the transmitter and the receiver. The method is simple and practical, is easy to implement, and is good in application prospect.