The invention discloses a method and device for generating an uplink/downlink mode switching event. The method comprises the following steps: receiving a transmission time interval boundary indication for a wireless electric link channel in a baseband module of a TDD (time division duplex) transceiver; initializing a timer when the transmission time interval boundary indication is received, so as to generate the uplink/downlink mode switching event which will be transmitted to a front-end circuit of the TDD transceiver after a duration of the timer and when the timer expires.