In　automated　multi-attribute　negotiation,　negotiation　agent　can　get　a　better　deal　by　using　heuristic　methods　to　make　effective　tradeoff　or　concession　between　different　attributes.　In　this　paper,　we　proposed　a　multi-attribute　negotiation　model　based　on　internal　factors　argumentation　which　allows　exchanging　private　information　as　argumentation,　and　then　can　reach　ideal　results　without　complex　computation.　Firstly,　the　negotiation　problem　definition　was　introduced.　Secondly,　negotiation　protocol　and　argumentation　ontology　structure　were　defined.　Thirdly,　we　focused　on　the　negotiation　strategy　and　algorithm　about　how　agents　react　in　the　negotiation　process,　such　as　made　proposals　and　argumentations.　Experiment　showed　that　Pareto　efficiency　and　good　social　welfare　results　were　reached　through　the　exchange　of　internal　factors　of　negotiation.　©　2013　IEEE.