A method for transmitting a pre-coding indicator, the method comprising: determining, by a UE, a first pre-coding indicator and a second pre-coding indicator, wherein the first pre-coding indicator and the second pre-coding indicator correspond to a pre-coding matrix which is equal to a matrix as a function of a first component pre-coding matrix and a second component pre-coding matrix, the first component pre-coding matrix is a block diagonal matrix with sub-matrixes on the diagonal being a Kronecker product of two matrixes, and the second component pre-coding matrix is dependent on the first component pre-coding matrix and composed of weighted column selection vectors, elements of the weighted column selection vector are zeros other than P non-zero elements with P being a positive integer; and transmitting, by the UE, the first pre-coding indicator and the second pre-coding indicator to the network side, so that the network side determines the pre-coding matrix according to the first pre-coding indicator and the second pre-coding indicator; wherein determining, by the UE, the first pre-coding indicator and the second pre-coding indicator comprises: determining, by the UE, at least one pre-coding matrix, and determining at least one first pre-coding indicator and at least one second pre-coding indicator corresponding to the at least one pre-coding matrix according to correspondence relationships between the at least one first pre-coding indicator, the at least one second pre-coding indicator and the at least one pre-coding matrix; and determining, by the UE, that one of the at least one determined first pre-coding indicator and one of the at least one determined second pre-coding indicator are the first pre-coding indicator and the second pre-coding indicator to be transmitted to the network side; wherein if the UE determines a plurality of pre-coding matrixes, then: the first pre-coding indicators corresponding to the determined plurality of pre-coding matrixes are the same, and/or, the second pre-coding indicators corresponding to the determined plurality of pre-coding matrixes are different. determining, by a UE, a first pre-coding indicator and a second pre-coding indicator, wherein the first pre-coding indicator and the second pre-coding indicator correspond to a pre-coding matrix which is equal to a matrix as a function of a first component pre-coding matrix and a second component pre-coding matrix, the first component pre-coding matrix is a block diagonal matrix with sub-matrixes on the diagonal being a Kronecker product of two matrixes, and the second component pre-coding matrix is dependent on the first component pre-coding matrix and composed of weighted column selection vectors, elements of the weighted column selection vector are zeros other than P non-zero elements with P being a positive integer; and transmitting, by the UE, the first pre-coding indicator and the second pre-coding indicator to the network side, so that the network side determines the pre-coding matrix according to the first pre-coding indicator and the second pre-coding indicator; wherein determining, by the UE, the first pre-coding indicator and the second pre-coding indicator comprises: determining, by the UE, at least one pre-coding matrix, and determining at least one first pre-coding indicator and at least one second pre-coding indicator corresponding to the at least one pre-coding matrix according to correspondence relationships between the at least one first pre-coding indicator, the at least one second pre-coding indicator and the at least one pre-coding matrix; and determining, by the UE, that one of the at least one determined first pre-coding indicator and one of the at least one determined second pre-coding indicator are the first pre-coding indicator and the second pre-coding indicator to be transmitted to the network side; determining, by the UE, at least one pre-coding matrix, and determining at least one first pre-coding indicator and at least one second pre-coding indicator corresponding to the at least one pre-coding matrix according to correspondence relationships between the at least one first pre-coding indicator, the at least one second pre-coding indicator and the at least one pre-coding matrix; and determining, by the UE, that one of the at least one determined first pre-coding indicator and one of the at least one determined second pre-coding indicator are the first pre-coding indicator and the second pre-coding indicator to be transmitted to the network side; wherein if the UE determines a plurality of pre-coding matrixes, then: the first pre-coding indicators corresponding to the determined plurality of pre-coding matrixes are the same, and/or, the second pre-coding indicators corresponding to the determined plurality of pre-coding matrixes are different.