An interference coordination method, wherein the method comprises: receiving (S201) direction restriction information, wherein the direction restriction information comprises angle restriction information, and the angle restriction information is used to indicate a restricted transmission direction; determining (S202) a signal preprocessing manner, wherein a transmission direction formed based on the signal preprocessing manner does not comprise the restricted transmission direction; feeding back (S203) the signal preprocessing manner; and wherein the direction restriction information further comprises correlation threshold information, and a correlation between the transmission direction formed based on the signal preprocessing manner and the restricted transmission direction is less than a correlation threshold indicated by the correlation threshold information, characterized in that the method further comprises determining a restricted codeword corresponding to the restricted transmission direction, obtaining a restricted Discrete Fourier Transform, DFT, matrix in the restricted transmission direction and the correlation threshold indicated by the correlation threshold information, determining a correlation direction corresponding to a correlation matrix between a DFT matrix and the restricted DFT matrix the correlation of said correlation direction is greater than or equal to the correlation threshold, using a correlation codeword corresponding to the correlation direction as the restricted codeword, and selecting a matched codeword from other codewords different from the restricted codeword corresponding to the DFT matrix in a preset codebook, and wherein the direction restriction information is used to instruct a terminal to avoid feeding back channel information in a transmission direction the same as the transmission direction restricted by the direction restriction information. receiving (S201) direction restriction information, wherein the direction restriction information comprises angle restriction information, and the angle restriction information is used to indicate a restricted transmission direction; determining (S202) a signal preprocessing manner, wherein a transmission direction formed based on the signal preprocessing manner does not comprise the restricted transmission direction; feeding back (S203) the signal preprocessing manner; and wherein the direction restriction information further comprises correlation threshold information, and a correlation between the transmission direction formed based on the signal preprocessing manner and the restricted transmission direction is less than a correlation threshold indicated by the correlation threshold information, characterized in that the method further comprises determining a restricted codeword corresponding to the restricted transmission direction, obtaining a restricted Discrete Fourier Transform, DFT, matrix in the restricted transmission direction and the correlation threshold indicated by the correlation threshold information, determining a correlation direction corresponding to a correlation matrix between a DFT matrix and the restricted DFT matrix the correlation of said correlation direction is greater than or equal to the correlation threshold, using a correlation codeword corresponding to the correlation direction as the restricted codeword, and selecting a matched codeword from other codewords different from the restricted codeword corresponding to the DFT matrix in a preset codebook, and wherein the direction restriction information is used to instruct a terminal to avoid feeding back channel information in a transmission direction the same as the transmission direction restricted by the direction restriction information. <EOS>