In this article a classification of rural economic types in Jiangsu Province is carried out by coefficient of mode ratio on the basis of 1980 statistics. The following indexes are used for classification.1. Gross rural social product per head of rural labour, 2. Percentage of rural labour with non-agricultural occupation, 3. Net income per head of rural population, 4.Pencentage of rural industy in gross rural social product, 5.Ratio of rural industrial and agricultural output value, 6.Percentage of crops farming in gross agricultural output value, 7. Ratio of crops farming and stockraising plus fishing output value.As the result 65 counties of Jiangsu Province are divided into 8 rural economic types.Ⅰ.Developed industrial type, Ⅱ.eveloped industrial-agricultural type, Ⅲ.Medium developed industrial-agricultural type, Ⅳ:Medium developed agricultural-industrial type, Ⅴ.Less developed agricultural-industrial type, Ⅵ.Less developed agricultural type, Ⅶ.Least developed agricultural, industrial type,.Ⅷ.Least developed agricultural type.Some of types are subdivided into subtypes 1 (with more diverse agriculture) and 2 (with less diverse agriculture).