Water protection forest construction is the important base of forest environment protection and sustainable development. Based on the report about the forest inventory in the suburbs of Beijing, and the principles of the ecology, productive function and sustainable development, 3 forest species and 18 forest types of water protection forest in Miyun reservoir watershed are classified as ecological forest, ecological-economical forest and economical-ecological forest. Suggestions on forest rational use and management are put forward. It can provide a scientificbasis for the concerned departments in making decisions and working out overall planning of water protection forest construction in Miyun reservoir watershed.