With　the　development　of　business　intelligence,　automatic　negotiation　has　become　an　important　channel　for　resolving　the　conflict　of　business.　When　buyers　negotiate　with　sellers,　they　often　concern　about　a　number　of　attributes,　and　look　forward　to　communicate　with　several　sellers,　and　then　choose　the　best　deal.　GA-based　one-to-many　multi-attribute　automatic　negotiation　model　is　proposed　and　simulated　to　validate　the　effectiveness　and　feasibility,　when　the　weight　of　the　buyer　changes,　the　final　solution　of　the　model　changes　according,　so　the　negotiation　is　sensitive　to　the　parameters　in　the　model.　©　2009　PICMET.