A transmitting method for HARQ information comprising: a first node detecting N transmission blocks received from a second node and generating M bits of HARQ information according to the detection result; the M bits of HARQ information being used to indicate the receiving status of the N transmission blocks; there being M2 bits among the M bits, for indicating the positions of k erroneous transmission blocks in the N transmission blocks, M2≤M; the length type of M2 including a first length type or a second length type; the first length type indicating that the value for M2 is predefined, and the second length type indicating that the value for M2 is determined based on k; and the first node transmitting the HARQ information to the second node. The above technical solution does not require strong correlation for the channel, and can conserve transmission resources and improve system throughput while reducing the HARQ information feedback overhead.