An uplink carrier aggregation device comprising: a radio frequency transceiver, at least two power amplifiers, one power-amplifier power module, a control chip, a multiplexer, and an antenna switch; wherein the radio frequency transceiver is connected to the at least two power amplifiers, and the radio frequency transceiver is configured to transmit modulated and transformed first radio frequency signals of different frequency bands to the corresponding power amplifiers; the at least two power amplifiers are connected to the multiplexer, and the at least two power amplifiers are configured to amplify the received first radio frequency signals of different frequency bands to obtain corresponding second radio frequency signals, and the at least two power amplifiers are configured to transmit the second radio frequency signals to the multiplexer, wherein the at least two power amplifiers operate in a linear zone; the multiplexer is connected to the antenna switch, and the multiplexer is configured to aggregate the second radio frequency signals transmitted by the at least two power amplifiers, and the multiplexer is configured to transmit the aggregated second radio frequency signals to the antenna switch; characterized in that the control chip is connected to the radio frequency transceiver and the power-amplifier power module, and the control chip is configured to determine at least two supply voltages each needed by each of the at least two power amplifiers, the control chip is configured to determine a target voltage to be output by the power-amplifier power module based on a maximum value of the supply voltages, and the control chip is configured to send a power supply instruction to the power-amplifier power module; and the power-amplifier power module is connected to the at least two power amplifiers, and the power-amplifier power module is configured to regulate the target voltage according to the power supply instruction and output the target voltage to the at least two power amplifiers simultaneously, wherein the target voltage output to the at least two power amplifiers simultaneously is voltages of a same magnitude. a radio frequency transceiver, at least two power amplifiers, one power-amplifier power module, a control chip, a multiplexer, and an antenna switch; wherein the radio frequency transceiver is connected to the at least two power amplifiers, and the radio frequency transceiver is configured to transmit modulated and transformed first radio frequency signals of different frequency bands to the corresponding power amplifiers; the at least two power amplifiers are connected to the multiplexer, and the at least two power amplifiers are configured to amplify the received first radio frequency signals of different frequency bands to obtain corresponding second radio frequency signals, and the at least two power amplifiers are configured to transmit the second radio frequency signals to the multiplexer, wherein the at least two power amplifiers operate in a linear zone; the multiplexer is connected to the antenna switch, and the multiplexer is configured to aggregate the second radio frequency signals transmitted by the at least two power amplifiers, and the multiplexer is configured to transmit the aggregated second radio frequency signals to the antenna switch; characterized in that the control chip is connected to the radio frequency transceiver and the power-amplifier power module, and the control chip is configured to determine at least two supply voltages each needed by each of the at least two power amplifiers, the control chip is configured to determine a target voltage to be output by the power-amplifier power module based on a maximum value of the supply voltages, and the control chip is configured to send a power supply instruction to the power-amplifier power module; and the power-amplifier power module is connected to the at least two power amplifiers, and the power-amplifier power module is configured to regulate the target voltage according to the power supply instruction and output the target voltage to the at least two power amplifiers simultaneously, wherein the target voltage output to the at least two power amplifiers simultaneously is voltages of a same magnitude.