The invention discloses a channel state information feedback and receiving method and apparatus for solving the problem of low reliability of the existing MIMO feedback scheme when the UE speed is high. The method comprises the following steps: a terminal performs beam forming on I pre-encoding units in at least one time-frequency resource by using different pre-encoding matrixes in a pre-encoding matrix group corresponding to a beam forming mode according to the determined beam forming mode, wherein the time-frequency resource is divided into I pre-encoding units, the beam forming mode characterizes the mapping relationship between the I pre-encoding units in the time-frequency resource and the pre-encoding matrixes in the pre-encoding matrix group corresponding to the beam forming mode, and I is an integer greater than 1; and terminal performs channel measurement on the time-frequency resource subjected to the beam forming to obtain CQI corresponding to the time-frequency resource, and feeds back the CQI corresponding to the time-frequency resource.