Channel information feedback method and device

The invention discloses a channel information feedback method and a channel information feedback device. The method comprises the following steps: dividing the bandwidth of a wireless communication system into N frequency units; wherein the N frequency units comprise one or a plurality of channel information sections; back feeding the channel information of the N frequency units on the channel information sections according to a first scheduled rule; or back feeding the channel information of the N frequency units on the bandwidth according to a second scheduled rule. wherein the channel information comprises MSC(mobile switching center), SNR (signal noise ratio) or channel state information. According to the channel information feedback method and the channel information feedback device, the accuracy of the channel information feedback is improved.