Abstract: n order to explore the change of vegetation cover in mountainous mining area， taking Daning mining area as an example， based on the 1998—2017 Landsat images， the fractional vegetation cover （FVC） in different periods of mining area was inversed by selecting the data of seven periods and substituting them into the pixel dichotomy model， At the same time， the change trend of vegetation coverage in the mining area is calculated by using Sen + Mann-Kendall trend analysis method. By studying the temporal and spatial variation characteristics and variation trend of vegetation coverage in different periods in Daning mining area， combined with underground mining activities， the temporal and spatial variation characteristics of vegetation coverage in 19 years in the study area were quantitatively analyzed， and reasonable suggestions were put forward according to the situation of the study area. The results show that: ① From 1998 to 2017， the overall vegetation coverage area of the study area increased by 4.724 1 km2， and the change trend is from gentle to good. The vegetation coverage area of the mining area accounts for 87.52%， which is mainly due to the implementation of relevant environmental protection and ecological construction policies and the impact of the environment of the mining area； ② Through the analysis of the response of surface vegetation to mining activities from 2005 to 2010， it is found that the vegetation coverage area after mining is smaller than that before mining， which indicates that mining activities will lead to the reduction of vegetation in the mining area and the destruction of ecological environment in the mining area； ③ Through the inversion of the vegetation coverage of the whole mining area and the working face of the mining area， it is found that the vegetation coverage of the study area is consistent with the mining activities in time and space.

Key words: mining subsidence, fractional vegetation cover, pixel dichotomy, Sen+Mann-Kendall