Disclosed are an information feedback method and apparatus, and a communication node and a non-transitory computer-readable storage medium. The information feedback method may include: receiving a downlink data transmission instruction sent by a second communication node; and triggering, according to the downlink data transmission instruction, the first communication node to feed back demodulation capability information and channel state information (CSI) to the second communication node; the CSI may include: a signal-to-noise ratio (SNR) and an SNR change rate of a received signal.