Based on the status quo of aquatic products in international trade,this paper uses spatial autocrrelation model to analyze world aquatic products in international trade from 2003 to 2008.The result shows that spatial dependence does exist in the world trade of aquatic products and analysis on localized spatial autocorrelation further indicates the spatial concentration and features in world trade of aquatic products.Spatial Lag Model and Spatial Error Model of world trade of aquatic products are estimated with the findings that spatial lag model is more suitable to spatial autocorrelation analysis in world trade of aquatic products.Similar countries (regions) in world aquatic products trade are tending towards spatial concentration which is gradually weakening year by year.National income is the main factor in determining the volume of world aquatic products trade of home countries(regions).Spatial lag weight value in world aquatic products trade has the positive correlation on the volume of world aquatic products trade in home countries.Aquatic products trade volume in bordering countries (regions) will increase 1%,while that in home countries (regions) will increase 1%.