A traffic adjustment method and an apparatus, which relate to the communications field, so that statistics on traffic of a receiving apparatus that needs to receive a first multicast packet can be accurately collected in a process of multicast packet transmission. A specific solution is as follows: A sending apparatus sends a first multicast packet, and determines whether an identity of a first receiving apparatus is in a receiving list of a first group, and if the identity of the first receiving apparatus is in the receiving list of the first group, the sending apparatus acquires multicast traffic of the first receiving apparatus, and subtracts the multicast traffic of the first receiving apparatus from preset traffic allocated to the first receiving apparatus to obtain corrected traffic of the first receiving apparatus.