Land classification,Series mapping,Resolution level,Terain differentiation,Mapping unit Abstract The Series mapping of land types is aimed to investigate thespatial structures of land withvarious scales and at various resolution levels. The really existing terrrain differentiation orders atvarious levels are the objective basis which makes it possible to map land types on separatescales,The land type mapping at each level has its mapping unit,mapping scale and serving purpose;and has its own land classification system also,The land type series mapping consisting ofmaps at various levels can comprehensively reveaI the formation factors,distributive order andspatial structure featrues of land types in a region.It also provides important bases for the inter-complement and inter-coordination between different level plannings and managements,A casestudy of land type serles mapping in Guizhou Province firmly verified the arguements mentioned above.