Abstract: Taking Yunyang county as an example, according to the natural, economic, landscape and other functions of forest land resources, the characteristics of the spatial distribution of forest land quality were studied and discussed with the guidance of landscape ecology theory and the application of GIS and RS technology. From the two dimensions of natural economic quality and landscape quality of forest land resources, the forest land quality evaluation indexes with 5 elements and 15 factors were constructed. After obtaining the attribute data of each index, the attribute datum of each index was normalized according to the numerical type, linguistic type and spatial diffusion type. The spatial clustering results showed that the natural economic quality of forest land was mainly in level Ⅰ and Ⅱ, and the area was about 57.14%. The overall quality of the forest landscape was general, and the area was only 36.45% belonging to level Ⅰ and Ⅱ. The results of this study are of great reference value to understand the spatial distribution of forest resource quality in an all-round and multi-scale way, and reasonably determine the key protection areas and ecological protection areas of forest resources.

Key words: forest land resources, quality evaluation, spatial clustering, Yunyang county