A load sharing method, comprising: obtaining (S101), by a router device, load sharing information of all downstream router devices that are in a load sharing relationship with the router device, wherein the load sharing information comprises load sharing algorithms and disturbance factors of all the downstream router devices that are in a load sharing relationship with the router device, wherein the load sharing algorithms and the disturbance factors are used to perform hash route selection, each of the disturbance factors is a random number generated by the respective downstream router device; determining (S102), by the router device, first load sharing information of the router device according to the load sharing information of all the downstream router devices that are in a load sharing relationship with the router device, wherein the first load sharing information comprises a first load sharing algorithm and a first disturbance factor that are of the router device, and the first disturbance factor is different from the disturbance factors of all the downstream router devices that are in a load sharing relationship with the router device; sending (S103), by the router device, the first load sharing information and the load sharing information of all the downstream router devices that are in a load sharing relationship with the router device to an upstream router device that is in a load sharing relationship with the router device; and when the router device receives a data packet, determining (S104), by the router device, a forwarding path of the data packet by using the first load sharing information. obtaining (S101), by a router device, load sharing information of all downstream router devices that are in a load sharing relationship with the router device, wherein the load sharing information comprises load sharing algorithms and disturbance factors of all the downstream router devices that are in a load sharing relationship with the router device, wherein the load sharing algorithms and the disturbance factors are used to perform hash route selection, each of the disturbance factors is a random number generated by the respective downstream router device; determining (S102), by the router device, first load sharing information of the router device according to the load sharing information of all the downstream router devices that are in a load sharing relationship with the router device, wherein the first load sharing information comprises a first load sharing algorithm and a first disturbance factor that are of the router device, and the first disturbance factor is different from the disturbance factors of all the downstream router devices that are in a load sharing relationship with the router device; sending (S103), by the router device, the first load sharing information and the load sharing information of all the downstream router devices that are in a load sharing relationship with the router device to an upstream router device that is in a load sharing relationship with the router device; and when the router device receives a data packet, determining (S104), by the router device, a forwarding path of the data packet by using the first load sharing information. <EOS>