Method and device for reporting channel state information (CSI)

The invention provides a method and device for reporting channel state information (CSI), wherein the method comprises: determining CSI to be reported according to a first condition and a second condition, wherein the CSI to be reported includes M classes of CSI; and reporting the CSI to be reported. The method and device solve high CSI quantized feedback complexity and cost in the prior art, and achieves an effect of reducing the CSI quantized feedback complexity and cost.