The spatial-temporal variability of vegetation coverage in Chongqing was studied based on the MODIS-EVI datasets using the method of dimidiate pixel modeling and anomaly percentage and variance coefficient and distribution indexes from 2000-2015. The results showed that:(1) the vegetation coverage was dominated by medium coverage annually and in summer and autumn. In spring, the vegetation coverage was dominated by low coverage from 2000-2007, while it was dominated by medium coverage from 2008-2015. (3) The annual coverage did not changed significantly. Little coverage was much more than normal in the springs of 2000, 2002, and 2003, and in the autumns of 2001 and 2006, and in the winter of 2011. Low coverage was much greater than normal in the autumns of 2000 and 2001. High coverage was much less than normal in the autumns of 2000 and 2008 and in the spring of 2014. (3) Priority was given to the fluctuation of vegetation coverage with low fluctuation annually and in spring, summer, and autumn, while priority was given to moderate fluctuation in winter. The highest percentage stability was recorded during summer and low fluctuation was in autumn, while the moderate and serious fluctuations were in winter. (4) The stable and low fluctuations were mainly distributed in the forest and grass on mountains, while the moderate and serious fluctuations were mainly distributed in the town, water, and the surrounding region. With the increase in elevation, the serious fluctuation was mainly distributed below 400m. The vegetation was stable annually and during summer, while in spring, autumn, and winter there was low fluctuation for vegetation between 400-800m. The annual and summer vegetation showed moderate fluctuation, while in spring, autumn, and winter it was stable between 800-1300m. Annual and summer vegetation showed low fluctuation, while in spring there was moderate fluctuation, but was stable in autumn and winter above 1300m.