Abstract:Based on the MODIS 13Q1 data from 2000 to 2018, the modified CVA (Change Vector Analysis), coefficient of variation and Hurst index ware used to analyze the dynamic change trend and continuity of the vegetation coverage in the Beibu Gulf Coastal Watershed Coverage changes and the drivers of vegetation cover changes. The research shows that the vegetation coverage of the Beibu Gulf coastal watershed is high and the interannual variation is small. The average NDVI for many years shows a law of gradual decrease from land to coastal, from the outer boundary of the watershed to the river center. Since 2000-2018, the vegetation coverage improvement area (73.6%) in the watershed is larger than the degradation area (26.3%). The estuaries and coastal areas are not only areas with obvious vegetation degradation but also areas with strong volatility of vegetation changes. In the future, the change of vegetation cover in the watershed is highly volatile, of which the continuous improvement area accounts for only 19.6%, the continuous degradation area accounts for 8%, and the remaining 72.4% is the volatility change area. The trend of vegetation cover change in the watershed is highly correlated with human factors and climatic factors, and is less correlated with terrain features.