The invention discloses a transceiver applied to a time division duplexing TDD system. The transceiver comprises a digital up-conversion unit, a digital predistortion processing unit, a downlink analogue unit, a radio-frequency transceiver unit, an uplink radio-frequency pretreatment unit, a switch, a feedback and uplink share unit and a digital down-conversion unit, wherein the switch conducts electrical passages among the feedback and uplink share unit, the uplink radio-frequency pretreatment unit and the digital down-conversion unit when the transceiver is in a receiving time slot; and the switch conducts electrical passages among the feedback and uplink share unit, the downlink analogue unit and the digital predistortion processing unit when the transceiver is in a transmitting time slot. By applying the invention, a feedback link and an uplink can perform the time division multiplexing on the feedback and uplink share unit, thereby reducing the complexity of the design of the transceiver, reducing the volume of the transceiver and also lowering the cost of the transceiver.