A method for feeding back channel measurement information, comprising: receiving, by a receiving station, a control frame for a channel measurement from a sending station, and sending channel measurement information to the sending station; correctly receiving, by the sending station, a part of the channel measurement information to obtain a valid response frame responding to the control frame for the channel measurement; characterized in that the method further comprises: sending, by the sending station, a channel measurement information sounding poll frame to the receiving station to request the receiving station to perform retransmission when the sending station determines that not all segments of the channel measurement information from the receiving station are correctly received, which specifically comprises: sending, by the sending station, the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a first segment when determining that only the first segment is not correctly received; sending, by the sending station, the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a segment which is not received correctly when determining that the first segment is correctly received; waiting, by the sending station, a Point Coordination Function InterFrame Space, PIFS, and then sending the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit all segments when determining that none of the segments is received correctly; waiting, by the sending station, a Short InterFrame Space, SIFS, and then sending the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a part of segments which are not received correctly when determining that the part of segments are not received correctly, the PIFS and the SIFS being concepts defined in Institute for Electrical and Electronic Engineers 802.11 standard. receiving, by a receiving station, a control frame for a channel measurement from a sending station, and sending channel measurement information to the sending station; correctly receiving, by the sending station, a part of the channel measurement information to obtain a valid response frame responding to the control frame for the channel measurement; characterized in that the method further comprises: sending, by the sending station, a channel measurement information sounding poll frame to the receiving station to request the receiving station to perform retransmission when the sending station determines that not all segments of the channel measurement information from the receiving station are correctly received, which specifically comprises: sending, by the sending station, the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a first segment when determining that only the first segment is not correctly received; sending, by the sending station, the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a segment which is not received correctly when determining that the first segment is correctly received; waiting, by the sending station, a Point Coordination Function InterFrame Space, PIFS, and then sending the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit all segments when determining that none of the segments is received correctly; waiting, by the sending station, a Short InterFrame Space, SIFS, and then sending the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a part of segments which are not received correctly when determining that the part of segments are not received correctly, the PIFS and the SIFS being concepts defined in Institute for Electrical and Electronic Engineers 802.11 standard. sending, by the sending station, the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a first segment when determining that only the first segment is not correctly received; sending, by the sending station, the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a segment which is not received correctly when determining that the first segment is correctly received; waiting, by the sending station, a Point Coordination Function InterFrame Space, PIFS, and then sending the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit all segments when determining that none of the segments is received correctly; waiting, by the sending station, a Short InterFrame Space, SIFS, and then sending the channel measurement information sounding poll frame to the receiving station to request the receiving station to retransmit a part of segments which are not received correctly when determining that the part of segments are not received correctly, the PIFS and the SIFS being concepts defined in Institute for Electrical and Electronic Engineers 802.11 standard.