A method for coordinated beamforming based on partial interference alignment, comprising: selecting an optimal partial interference alignment mode from selectable partial interference alignment modes of terminals covered by base stations in a coordinating cluster of a coordinated multiple points transmission according to a chordal distance criterion; and transmitting, by the base stations, signals to the terminals by adopting the optimal partial interference alignment mode; wherein: selecting an optimal partial interference alignment mode from selectable partial interference alignment modes of terminals covered by base stations in a coordinating cluster of a coordinated multiple points transmission according to a chordal distance criterion comprises: respectively calculating precoding matrixes of each terminal in different partial interference alignment modes, wherein the precoding matrixes of the terminals in the same partial interference alignment mode form a precoding matrix group, one partial interference alignment mode corresponds to one precoding matrix group; and selecting a precoding matrix group corresponding to the optimal partial interference alignment mode from all precoding matrix groups according to the chordal distance criterion; and transmitting, by the base stations, signals to the terminals by adopting the optimal partial interference alignment mode comprises: transmitting, by the base stations, the signals to the terminals by adopting the precoding matrix group corresponding to the optimal partial interference alignment mode. selecting an optimal partial interference alignment mode from selectable partial interference alignment modes of terminals covered by base stations in a coordinating cluster of a coordinated multiple points transmission according to a chordal distance criterion; and transmitting, by the base stations, signals to the terminals by adopting the optimal partial interference alignment mode; wherein: selecting an optimal partial interference alignment mode from selectable partial interference alignment modes of terminals covered by base stations in a coordinating cluster of a coordinated multiple points transmission according to a chordal distance criterion comprises: respectively calculating precoding matrixes of each terminal in different partial interference alignment modes, wherein the precoding matrixes of the terminals in the same partial interference alignment mode form a precoding matrix group, one partial interference alignment mode corresponds to one precoding matrix group; and selecting a precoding matrix group corresponding to the optimal partial interference alignment mode from all precoding matrix groups according to the chordal distance criterion; and transmitting, by the base stations, signals to the terminals by adopting the optimal partial interference alignment mode comprises: transmitting, by the base stations, the signals to the terminals by adopting the precoding matrix group corresponding to the optimal partial interference alignment mode. selecting an optimal partial interference alignment mode from selectable partial interference alignment modes of terminals covered by base stations in a coordinating cluster of a coordinated multiple points transmission according to a chordal distance criterion comprises: respectively calculating precoding matrixes of each terminal in different partial interference alignment modes, wherein the precoding matrixes of the terminals in the same partial interference alignment mode form a precoding matrix group, one partial interference alignment mode corresponds to one precoding matrix group; and selecting a precoding matrix group corresponding to the optimal partial interference alignment mode from all precoding matrix groups according to the chordal distance criterion; and respectively calculating precoding matrixes of each terminal in different partial interference alignment modes, wherein the precoding matrixes of the terminals in the same partial interference alignment mode form a precoding matrix group, one partial interference alignment mode corresponds to one precoding matrix group; and selecting a precoding matrix group corresponding to the optimal partial interference alignment mode from all precoding matrix groups according to the chordal distance criterion; and transmitting, by the base stations, signals to the terminals by adopting the optimal partial interference alignment mode comprises: transmitting, by the base stations, the signals to the terminals by adopting the precoding matrix group corresponding to the optimal partial interference alignment mode.