A system for enhancing an aerospace coverage capability of a mobile communication base station, comprising: a baseband processing unit, a remote radio unit, and a full-airspace array antenna; wherein the full-airspace array antenna comprises a conversion channel module, an interface processing module, a digital beamforming module, a transceiver channel module, and an antenna array; the transceiver channel module comprises a plurality of transceiver channels, and the antenna array comprises a plurality of antenna array elements, wherein the plurality of antenna array elements are in a one-to-one correspondence with the plurality of transceiver channels; the baseband processing unit is connected to the remote radio unit, the remote radio unit is connected to the conversion channel module through a radio-frequency cable, and the conversion channel module is connected to the digital beamforming module through the interface processing module; and the conversion channel module is configured to realize a conversion between a radio-frequency signal and a digital signal; the interface processing module is configured to complete data aggregation and transmission between the conversion channel module and the digital beamforming module; the digital beamforming module is configured to adjust an amplitude and phase weighting coefficient of each transceiver channel of the plurality of transceiver channels to form transmitting beams covering a spatial domain; and the digital beamforming module is connected to each antenna array element of the plurality of antenna array elements through the each transceiver channel, wherein the each antenna array element corresponds to the each transceiver channel characterized in that each transceiver channel includes a radio-frequency transceiver module, a first selection switch, a transceiver switching switch and a first duplexer, wherein the digital beamforming module is connected to the radio frequency transceiver module, the radio frequency transceiver module is connected to transceiver switching switch and first duplexer respectively through first selection switch, and the conversion channel comprises a second duplexer, a coupler, a transceiver control unit, an envelope detection unit, a second selection switch, and a signal conversion channel, wherein one end of the signal conversion channel is connected to the interface processing module, and the other end of the signal conversion channel is connected to transceiver control unit and the second duplexer respectively through the second selection switch and the transceiver control unit is connected to the coupler. a baseband processing unit, a remote radio unit, and a full-airspace array antenna; wherein the full-airspace array antenna comprises a conversion channel module, an interface processing module, a digital beamforming module, a transceiver channel module, and an antenna array; the transceiver channel module comprises a plurality of transceiver channels, and the antenna array comprises a plurality of antenna array elements, wherein the plurality of antenna array elements are in a one-to-one correspondence with the plurality of transceiver channels; the baseband processing unit is connected to the remote radio unit, the remote radio unit is connected to the conversion channel module through a radio-frequency cable, and the conversion channel module is connected to the digital beamforming module through the interface processing module; and the conversion channel module is configured to realize a conversion between a radio-frequency signal and a digital signal; the interface processing module is configured to complete data aggregation and transmission between the conversion channel module and the digital beamforming module; the digital beamforming module is configured to adjust an amplitude and phase weighting coefficient of each transceiver channel of the plurality of transceiver channels to form transmitting beams covering a spatial domain; and the digital beamforming module is connected to each antenna array element of the plurality of antenna array elements through the each transceiver channel, wherein the each antenna array element corresponds to the each transceiver channel characterized in that each transceiver channel includes a radio-frequency transceiver module, a first selection switch, a transceiver switching switch and a first duplexer, wherein the digital beamforming module is connected to the radio frequency transceiver module, the radio frequency transceiver module is connected to transceiver switching switch and first duplexer respectively through first selection switch, and the conversion channel comprises a second duplexer, a coupler, a transceiver control unit, an envelope detection unit, a second selection switch, and a signal conversion channel, wherein one end of the signal conversion channel is connected to the interface processing module, and the other end of the signal conversion channel is connected to transceiver control unit and the second duplexer respectively through the second selection switch and the transceiver control unit is connected to the coupler.