The invention discloses a multicast routing processing method. The method provided by the embodiment of the invention comprises the following steps: a first root device receiving a first multicast joining message sent by the target leaf device or receiving a second multicast joining message sent by the routing reflector, wherein the first multicast join message comprises multicast routing information, the multicast routing information comprises a device routing identifier, and the second multicast join message is the same as the multicast routing information contained in the first multicast join message; the first root device determining that the multicast routing information satisfies a preferred condition according to the device routing identifier; the first root device determining whether second root device information contained in the multicast routing information is the same as the first root device information; if the multicast routing information of the target leaf device is the same as the multicast routing information of the target leaf device, the first root device adding the multicast routing information of the target leaf device to a VPN routing table of the first root device; and the first root device sending multicast data to the target leaf device according to the VPN routing table. According to the scheme, it can be ensured that each target leaf device can receive multicast data.