The invention provides a point-to-point communication device supporting FDD. The point-to-point communication device comprises a transceiver, a reversing switch and a duplexer, wherein the transceiveris connected with the duplexer through the reversing switch; and the transceiver is provided with a sending port for supporting the transmission of radio frequency signals of a first frequency band and a second frequency band and a receiving port for receiving radio frequency signals of the first frequency band and the second frequency band. The duplexer is provided with a first port supporting receiving and outputting the radio frequency signals of the first frequency band, and a second port supporting receiving and outputting radio frequency signals of the second frequency band. The reversing switch is provided with two states. When the reversing switch is in a first state, the sending port is connected with the first port and used for sending radio frequency signals in the first frequency band, and the receiving port is connected with the second port and is used for receiving radio frequency signals of the second frequency band. When in a second state, the sending port is connectedwith the second port and is used for sending a radio frequency signal in a second frequency band, and the receiving port is connected with the first port and used for receiving the radio frequency signals of the first frequency band.