Method and apparatus for processing service packet, and gateway device

The invention discloses a method and apparatus for processing service packet, and gateway devic. . The method comprises: a gateway device receiving a service packet, the service packet carrying an application identification, and the application identification being used for indicating an application to which the service packet belongs; the gateway device identifying the application to which the service packet belongs according the application identification; and the gateway device executing a processing policy on the service packet according to a pre-established correspondence between the application and the processing policy. In the embodiments of the present invention, by carrying an application identification in a service packet and pre-storing the application identification in a gateway device, the gateway device can identify an application according to matching between the application identification carried in the service packet and the application identification stored in the gateway device, thereby improving the rate of identifying the application by the gateway device.