A wireless terminal is provided, including a main control unit, a radio frequency power amplifier, and an antenna, where: the main control unit is coupled to the radio frequency power amplifier, and an output end of the radio frequency power amplifier is coupled to the antenna; the main control unit is configured to initiate a procedure for establishing a physical channel, and send a first gain control instruction to the radio frequency power amplifier, where when there is no uplink data to be transmitted through the physical channel link within a first preset time, the first gain control instruction is an instruction for reducing a gain; the radio frequency power amplifier determines its gain level according to the first gain control instruction; and the antenna is configured to transmit a radio frequency signal amplified by the radio frequency power amplifier.