A service packet forwarding and processing method, comprising: obtaining, by an AP currently associated with a mobile terminal, change information of a packet forwarding path of the mobile terminal after the mobile terminal roaming to the AP successfully; and simulating, by the AP, the mobile terminal to send a path update packet comprising an address of the mobile terminal to a forwarding device according to the change information of the packet forwarding path of the mobile terminal, so that the forwarding device learns the address of the mobile terminal on a port corresponding to the packet forwarding path of the mobile terminal according to the path update packet, wherein the path update packet is an Address Resolution Protocol, ARP, packet or a Reverse Address Resolution Protocol, RARP, packet, wherein the sending a path update packet to a forwarding device, so that the forwarding device performs update processing on the packet forwarding path of the mobile terminal according to the path update packet comprises: sending the ARP packet to the forwarding device, so that the forwarding device updates an ARP table and a media access control, MAC, table according to the ARP packet, wherein the ARP packet comprises an Internet Protocol, IP, address of the mobile terminal and a media access control MAC address of the mobile terminal; or sending the RARP packet to the forwarding device, so that the forwarding device updates a MAC table according to the RARP packet, wherein the RARP packet comprises a MAC address of the mobile terminal. obtaining, by an AP currently associated with a mobile terminal, change information of a packet forwarding path of the mobile terminal after the mobile terminal roaming to the AP successfully; and simulating, by the AP, the mobile terminal to send a path update packet comprising an address of the mobile terminal to a forwarding device according to the change information of the packet forwarding path of the mobile terminal, so that the forwarding device learns the address of the mobile terminal on a port corresponding to the packet forwarding path of the mobile terminal according to the path update packet, wherein the path update packet is an Address Resolution Protocol, ARP, packet or a Reverse Address Resolution Protocol, RARP, packet, wherein the sending a path update packet to a forwarding device, so that the forwarding device performs update processing on the packet forwarding path of the mobile terminal according to the path update packet comprises: sending the ARP packet to the forwarding device, so that the forwarding device updates an ARP table and a media access control, MAC, table according to the ARP packet, wherein the ARP packet comprises an Internet Protocol, IP, address of the mobile terminal and a media access control MAC address of the mobile terminal; or sending the RARP packet to the forwarding device, so that the forwarding device updates a MAC table according to the RARP packet, wherein the RARP packet comprises a MAC address of the mobile terminal. sending the ARP packet to the forwarding device, so that the forwarding device updates an ARP table and a media access control, MAC, table according to the ARP packet, wherein the ARP packet comprises an Internet Protocol, IP, address of the mobile terminal and a media access control MAC address of the mobile terminal; or sending the RARP packet to the forwarding device, so that the forwarding device updates a MAC table according to the RARP packet, wherein the RARP packet comprises a MAC address of the mobile terminal.