Dynamic　SOA　collaboration　is　a　new　approach　for　SOA　collaboration.　In　dynamic　SOA　collaboration,　both　the　workflows　and　services　can　be　determined　at　runtime,　while　in　the　traditional　service　collaboration,　only　the　services　can　be　discovered　at　runtime　and　the　workflows　must　be　pre-defined　at　design　time.　With　the　change　of　requirement,　the　traditional　service　collaboration　is　hard　to　adapt　to　these　changes.　Dynamic　SOA　collaboration　is　a　way　to　solve　this　problem.　In　this　paper　we　propose　a　classification　of　SOA-based　collaborative　architecture,　and　then　we　propose　a　new　architecture　for　dynamic　SOA　collaboration.