Land patch is a agricultural-landscape unit which has relative uniform phisical and socia-economic features and utility direction. The patch-structure pattern is a historical product and represents theregional character. Land patch map can be used as the base of thematic series mapping and GIS. In this paper, thd related topics, sudch as thd contents, stability, basic principles and means of land patch map are discussed，according to the results from a case study in Changwu experimental and demonstritive area of Loess plateau.