Abstract: Based on dimidiate pixel model, we estimated the Fractional vegetation coverage(FVC) of Wolong Nature Reserve in 2000 and 2015 respectively and explored changes of vegetation coverage in the fifteen years. Furtherly, spatial characteristics of vegetation cover changes were analyzed and their responses to topographical factors were revealed. The results showed that:(1)The vegetation coverage of Wolong Nature Reserve was generally good in both 2000 and 2015. Most of the regions were covered with high vegetation coverage. The overall spatial pattern showed a trend of high in the southeast and low in the northwest.(2) The area of high coverage during the study period reduced significantly, while other coverage level areas increased with different extent, and the average coverage of vegetation decreased a little.(3) Three types of vegetation coverage changes were established in the study, i.e. stability, degradation and improvement. It was found that type of stability distributed dominantly in all elevation ranges. In the case of their spatial distribution, type of degradation was relatively significant in both low and high altitude areas, while types of stability and improvement were relatively significant in the elevation range of 1 500-3 250 m.(4) An obvious change in vegetation coverage was found among varied aspects. The vegetation coverage degraded on the sunny slope and improved on the shady slope. The study explored the spatial distribution and variation characteristics of vegetation coverage in Wolong Nature Reserve, which has important reference value for both evaluation of local ecological environment and vegetation restoration in the reserve management.