A packet transmission method, comprising: receiving, by a hybrid access gateway, packets that are sent by a network side device and destined for a home gateway, wherein the home gateway communicates with the hybrid access gateway by using a first transmission link and a second transmission link separately; characterizing in that the method further comprises: obtaining, by the hybrid access gateway, a first committed information rate, CIR, of the first transmission link and a second CIR of the second transmission link, wherein the first CIR is a first preset transmission rate of data transmission supported by the first transmission link, and the second CIR is a second preset transmission rate of data transmission supported by the second transmission link; classifying, by the hybrid access gateway, the packets into a first-type packet and a second-type packet based on the first CIR and the second CIR, and transmitting the first-type packet by using the first transmission link and the second-type packet by using the second transmission link; and wherein the obtaining of a first CIR of the first transmission link and a second CIR of the second transmission link is performed in response to detecting that congestion occurs on the first transmission link and/or that no congestion occurs on the second transmission link. receiving, by a hybrid access gateway, packets that are sent by a network side device and destined for a home gateway, wherein the home gateway communicates with the hybrid access gateway by using a first transmission link and a second transmission link separately; characterizing in that the method further comprises: obtaining, by the hybrid access gateway, a first committed information rate, CIR, of the first transmission link and a second CIR of the second transmission link, wherein the first CIR is a first preset transmission rate of data transmission supported by the first transmission link, and the second CIR is a second preset transmission rate of data transmission supported by the second transmission link; classifying, by the hybrid access gateway, the packets into a first-type packet and a second-type packet based on the first CIR and the second CIR, and transmitting the first-type packet by using the first transmission link and the second-type packet by using the second transmission link; and wherein the obtaining of a first CIR of the first transmission link and a second CIR of the second transmission link is performed in response to detecting that congestion occurs on the first transmission link and/or that no congestion occurs on the second transmission link. obtaining, by the hybrid access gateway, a first committed information rate, CIR, of the first transmission link and a second CIR of the second transmission link, wherein the first CIR is a first preset transmission rate of data transmission supported by the first transmission link, and the second CIR is a second preset transmission rate of data transmission supported by the second transmission link; classifying, by the hybrid access gateway, the packets into a first-type packet and a second-type packet based on the first CIR and the second CIR, and transmitting the first-type packet by using the first transmission link and the second-type packet by using the second transmission link; and wherein the obtaining of a first CIR of the first transmission link and a second CIR of the second transmission link is performed in response to detecting that congestion occurs on the first transmission link and/or that no congestion occurs on the second transmission link.