Embodiments of the present disclosure provide a processing method for a service flow packet, and the method includes: receiving, by an access device, a service flow packet sent by a terminal; determining, by the access device according to a flow table and the received service flow packet, a function module for processing the service flow packet; sending, by the access device, the service flow packet to the function module; obtaining, by the access device, a service flow packet processed by the function module; and sending, by the access device, the service flow packet processed by the function module. The embodiments of the present disclosure further provide a device for processing a service flow packet. By using the present disclosure, processing flexibility and processing efficiency of a service flow packet can be improved.