Provided are a method for load balancing of a Service Function Chain (SFC), a Service Function forwarder (SFF), a classification device, a controller and an SFC system. The method includes: an SFF receives a packet, herein an SFC header of the packet carries a Service Function Chain Flow Identifier (SFCFID); and the SFF forwards the packet in a load balancing path according to the SFCFID carried in the SFC header of the packet.