Abstract: Based on the definition of land from FAO, Agricultural Land is more far-ranging conception than that of soil, and agricultural land is the part of land used for agricultural action. The classification system can be classified into three types, that is land type, land subtype and land use synthesis using ideal thought of small unit classification in systemic classification of land type in Wanbailin district of Taiyuan city in this paper. Those methods solved theory in land classification, as well as solved the actual puzzle of minimum evaluation unit that perplexing classification of agricultural land. Wanbailin district of Taiyuan city in the verge of loess plateau were classified into 10 land type, 42 land subtype and 309 land use synthesis by using object oriented code technique of land resource. With GIS supporting, a 1:35000 land type map was set up. This method established the theoretic base and methods of classification of agricultural land using the concept of land type.

Key words: Land, classification of land type, resource information code, GIS