The anti-jamming antenna performs reception, amplification, down-conversion, filtering, and anti-jamming processing for 4 channels of BDS_B3, BDS_B1 frequency signals. It also supports automatic switching, reception, down-conversion, and amplification for 1 channel of high-precision BDS_B1 and BDS_B3 frequencies. The RF signals are combined and forwarded to the receiver. The unit operates with a wide voltage power supply and consists of three parts: the antenna array assembly, RF assembly, and anti-jamming processing assembly. It can counter three wide band interference sources. The product has low power consumption, can achieve direction-finding functionality under both interference and interference free conditions.