Abstract: By studying the ecological service function value at the regional scale of protected areas, it provides scientific basis for exploring the service function value of forest ecosystems and is of great significance for promoting regional sustainable development. Taking the data the protected areas as the object, the indicator evaluation method is adopted to focus on evaluating the value and distribution pattern of 7 functional categories and 19 specific indicator categories in the forest ecosystem service function evaluation indicator system. The results showed that: ① The total value of forest ecosystem service functions in Fenshuiling reserve is about 4.5 billion yuan, with a unit area value of 10.06 thousand yuan / (hm²·a). ② The proportion of forest ecosystem service value in different functional categories within the protected area is ranked as biodiversity conservation ＞ Carbon fixation and oxygen release ＞ Conservation of water sources ＞ Wood product supply ＞ Conservation of soil ＞ Forest nutrient fixation ＞ Purifying the atmospheric environment. ③ From the perspective of the proportion of ecosystem service value in different functional zones, the buffer zone of the protected zone accounts for the highest proportion of 45.72%, followed by the core zone accounting for 44.1%, and the experimental zone accounting for the lowest proportion of 10.19%.