Abase station, comprising: a base station indoor apparatus and a base station outdoor apparatus; wherein: the base station outdoor apparatus comprises: a ground service antenna, a satellite antenna, a satellite signal processing module configured to perform decoding processing on a satellite radio frequency signal received by the satellite antenna to obtain a reference clock source signal, and a fourth ground service processing module configured to perform demodulation processing on a modulation signal received by the ground service antenna; and the fourth ground service processing module is further configured to perform phase discrimination processing on a current system clock signal and the reference clock source signal that is obtained by the satellite signal processing module to obtain a phase difference; the base station being characterized in that: the fourth ground service processing module is configured to perform phase-locked tracking according to the phase difference so as to obtain a calibrated system clock signal, and to send the calibrated system clock signal to a fifth service processing module in the base station indoor apparatus; wherein: the fourth ground service processing module is further configured to compare an initial phase of the reference clock source signal with an initial phase of a current system frame synchronization signal to obtain an initial phase deviation value, to calibrate the initial phase of the system frame synchronization signal according to the initial phase deviation value, and to send the system frame synchronization signal with the initial phase calibrated to the fifth service processing module. a base station indoor apparatus and a base station outdoor apparatus; wherein: the base station outdoor apparatus comprises: a ground service antenna, a satellite antenna, a satellite signal processing module configured to perform decoding processing on a satellite radio frequency signal received by the satellite antenna to obtain a reference clock source signal, and a fourth ground service processing module configured to perform demodulation processing on a modulation signal received by the ground service antenna; and the fourth ground service processing module is further configured to perform phase discrimination processing on a current system clock signal and the reference clock source signal that is obtained by the satellite signal processing module to obtain a phase difference; the base station being characterized in that: the fourth ground service processing module is configured to perform phase-locked tracking according to the phase difference so as to obtain a calibrated system clock signal, and to send the calibrated system clock signal to a fifth service processing module in the base station indoor apparatus; wherein: the fourth ground service processing module is further configured to compare an initial phase of the reference clock source signal with an initial phase of a current system frame synchronization signal to obtain an initial phase deviation value, to calibrate the initial phase of the system frame synchronization signal according to the initial phase deviation value, and to send the system frame synchronization signal with the initial phase calibrated to the fifth service processing module. the fourth ground service processing module is configured to perform phase-locked tracking according to the phase difference so as to obtain a calibrated system clock signal, and to send the calibrated system clock signal to a fifth service processing module in the base station indoor apparatus; wherein: the fourth ground service processing module is further configured to compare an initial phase of the reference clock source signal with an initial phase of a current system frame synchronization signal to obtain an initial phase deviation value, to calibrate the initial phase of the system frame synchronization signal according to the initial phase deviation value, and to send the system frame synchronization signal with the initial phase calibrated to the fifth service processing module.