Abstract: The east region of Sichuan Province(C)huandong is a crucial ecological barrier in the upper reaches of the Yangtze River, which is of great significance. Using the dataset of 6 period from 1990 to 2015, both land-use change dynamics and value of ecosystem services were investigated by employing the methods of ArcGIS application and spatial statistics. Moreover, the driving factors were also researched in this study. It is found that:(1) Farmland and forest land were the main type of land use, which experienced low comprehensive dynamics. (2) The total ecosystem services value presented a trend of continuously increase. The greatest contribution of land use types to the total ecosystem services value was forestland (42%); and farmland (31%), water land (22%), grassland (5%) ranked 2^nd, 3^rd and 4^th, respectively. Unused land (0%) endured the lowest level. Besides, the ecosystem services value of unit area showed a declining trend from both northeast and southeast toward the central and west of the study area. Meanwhile,different types of land use had different impact on the ecosystem service value. The results show that both forestland and water land had strong positive correlation with ecosystem service value. (3) The main driving forces, which affected regional ecosystem service value, includes population density, rural population, industrial output and domestic tourism income. In addition, spational correlation analyais revealed that socio-economic factors had negative correlation with ecosystem service value. Low-Low and High-Low areas were clustered in the west, and Low-High and High-High areas were clustered in the south. Therefore, the results of this research can provide reasonable scientific basis on the ecological security and sustainable development for the east region of Sichuan Province.

Key words: the east region of Sichuan Province, land use, ecosystem service, spatial relevance, driving force