Using chlorophyll fluorescence induction kinetics and analysis technique (JIPtest)，the study analyzed the damage status of plants and the photosynthetic response of plants to stress. The result is very important to vegetation restoration and reconstruction in mining area. Taken Caragana korshinskii as the target plant, which live in Shendong Mining subsidence area of different slope positions (upslope, mesoslope and downslope). The study compared the differences in chlorophyll fluorescence parameters from 1 to 2 years after coal ming subsidence. In this paper, it has explored that the degree of damage and adaptability mechanism of different slope positions in coal mining subsidence. The results show that: (1) on upslope and downslope, V_j and M_o of C. korshinskii leaves increased significantly; at the same time, ABS/RC, TR_o/RC and DI_o/CS_o increased, while F_v/F_m and PI_ABS decreased greatly; after 1 years of subsidence, the maximum increase of W_k value reached 74.54%, and it was close to the control value after 2 years of subsidence. (2) On mesoslope, V_j and M_o of C. korshinskii increased first and then decreased, while ABS/RC and TR_o/RC decreased significantly, F_v/F_m, PI_ABS and W_k changed little. (3) The first two axes of redundancy analysis effectively explained 52% of Fluorescenceenvironmental variation. The correlation coefficients of soil water and available phosphorus with the first axis were 0.57 and 0.5, respectively. It suggest that the photosynthetic system Ⅱ (PSⅡ) of Caragana was severely damaged in the upper and lower slopes, and the reaction center reduced damage by dissipating excess excitation energy; the PSⅡ of Caragana in middle slope was less affected by coal mining, and the reaction center protected itself by reversible inactivation; soil water, available phosphorus and available potassium are the key environmental factors that affecting the PSⅡ of Caragana in the coal mining subsidence area.