Vegetation cover is a crucial determinant of ecological environment in big cities. But the spatial-temporal dynamics of vegetation cover in the inner city and peri-urban areas in the process of rapid urbanization are still unclear and need to be researched in combination with remote sensing data. This study estimated the distribution of Fraction Vegetation Cover （FVC） of Beijing by using Landsat images， and calculated moving window mean value and standard deviation of FVC， which were respectively used as proxies for local vegetation coverage and FVC heterogeneity. Then the moving windows with significant change trend were identified by Mann-Kendall test and the slope of change was estimated by Sen’s Slope. And on this basis， we analyzed the change trend of FVC of Beijing. The results showed that during 1984~2014 the areas with significant increasing trends of vegetation coverage were mainly distributed in the urban center and the north and the west mountainous areas， and the areas with significant decreasing trends of vegetation coverage were mainly distributed in the northeast， east， southeast， south and southwest suburbs. Besides， the areas with significant increasing trends of FVC heterogeneity were mainly in flatlands while the areas with significant decreasing trends of FVC heterogeneity were mainly in the north mountainous areas.

Keywords： Fractional Vegetation Cover ; Change trend ; Landsat ; Beijing