TD-LTE three-band automatic identification power amplification method and device

The invention discloses a TD-LTE three-band automatic identification power amplification method and device. According to the method, through adoption of an input signal selection circuit, a target band signal needing to be processed through power amplification is selected from a radio frequency signal; and through adoption of a monitoring unit, a power control management circuit is controlled to keep the power of a power amplification circuit corresponding to the target band signal and cut off the power of other two power amplification circuits not corresponding to the target band signal, so the power consumption of the device is effectively reduced when the device works. The power amplification circuits of three bands are integrated, only a radio frequency receiving unit and a radio frequency transmitting unit are set and the radio frequency signals of three bands can be received, identified and transmitted automatically. The integration degree of the device is effectively improved and the cost of the device