An indication method, wherein the method comprises: generating, indication information, wherein the indication information is used to indicate six component vectors of a precoding vector and a combination coefficient of each component vector, the six component vectors comprising a first component vector, a second component vector, a third component vector, a fourth component vector, a fifth component vector and a sixth component vector, the first component vector is a normalization reference component vector, the second component vector, the third component vector, the fourth component vector, the fifth component vector and the sixth component vector are non-normalization reference component vectors, the combination coefficient of the first component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 0, a narrowband amplitude coefficient whose quantization bit quantity is 0, and a narrowband phase coefficient whose quantization bit quantity is 0, the combination coefficient of the second component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 1, and a narrowband phase coefficient whose quantization bit quantity is 3, the combination coefficient of the third component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 1, and a narrowband phase coefficient whose quantization bit quantity is 3, the combination coefficient of the fourth component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 1, and a narrowband phase coefficient whose quantization bit quantity is 3; and sending, the indication information; characterized in that the combination coefficient of the fifth component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 0, and a narrowband phase coefficient whose quantization bit quantity is 2, the combination coefficient of the sixth component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 0, and a narrowband phase coefficient whose quantization bit quantity is 2. generating, indication information, wherein the indication information is used to indicate six component vectors of a precoding vector and a combination coefficient of each component vector, the six component vectors comprising a first component vector, a second component vector, a third component vector, a fourth component vector, a fifth component vector and a sixth component vector, the first component vector is a normalization reference component vector, the second component vector, the third component vector, the fourth component vector, the fifth component vector and the sixth component vector are non-normalization reference component vectors, the combination coefficient of the first component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 0, a narrowband amplitude coefficient whose quantization bit quantity is 0, and a narrowband phase coefficient whose quantization bit quantity is 0, the combination coefficient of the second component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 1, and a narrowband phase coefficient whose quantization bit quantity is 3, the combination coefficient of the third component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 1, and a narrowband phase coefficient whose quantization bit quantity is 3, the combination coefficient of the fourth component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 1, and a narrowband phase coefficient whose quantization bit quantity is 3; and sending, the indication information; characterized in that the combination coefficient of the fifth component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 0, and a narrowband phase coefficient whose quantization bit quantity is 2, the combination coefficient of the sixth component vector comprising a wideband amplitude coefficient whose quantization bit quantity is 3, a narrowband amplitude coefficient whose quantization bit quantity is 0, and a narrowband phase coefficient whose quantization bit quantity is 2.