Provided are a method for reporting an antenna port weighting vector. The method includes: receiving quantization mode information of weighting coefficients of second vectors configured by a second node, or reporting to a second node quantization mode information of weighting coefficients of the second vectors; and reporting to the second node the second vectors and weighting coefficients of the second vectors quantized according to the quantization mode information; where the quantization mode information includes information indicating a quantization state set; a first vector is an antenna port weighting vector and consists of the second vectors; and the second vectors include at least one of the following vectors: vectors of which elements have a one-to-one correspondence with antenna ports or vectors of which elements have a one-to-one correspondence with reported frequency domain sub-bands.