In this study,soil samples from the reclaimed land filled with coal gangue (SS) with different reclamation years (2015,2010,and 2001 years) in Xuzhou mining area and from normal farmlands which were not affected by coal mining subsidence (SSC) were collected.The sequence numbers of bacterial community were determined by the Illumina PE250sequencing method,and the vertical structure and time structure were analyzed.The results showed that:(1) Reclamation decreased the number of bacteria species and the community diversity,but the goodness between SS and SSC increased with the age of reclamation.(2)Firmicutes and Proteobacteria dominated in SS at the phylum level,the number of Firmicutes increased after reclamation and Firmicutes also likely transferred from 20~40cm to 0~20cm soil layer.(3)Bacilli predominantly existed in soils at the class level,the number of Bacilli in 0~20cm soil layer was higher in SS than in SSC samples,and the number in 20~40cm soil layers of SS samples decreased with the increase of the reclamation years.(4)Lactobacillales and Bacillales dominated in SS at the order level.Desulfuromonadales played an important role in the remediation of heavy metal pollution and its number in 0~20cm soil layer of SS was 74.81~99.59% less than that in SSC samples.(5) In SS samples,Bacillus,Enterococcus and Streptococcaceae were the dominant family,while Bacillus,Enterococcus and Lactococcus were the dominant genus,and Bacillus sp.JH7,Enterococcus faecium and Lactococcus piscium were the dominant species.All of these in SS samples were less in number than SSC samples especially in 0~20cm soil layer,while the number in 20~40cm soil layer of SS decreased with the increase of the reclamation years.(6) Dehydrogenase activity was negatively correlated with the number of Firmicutes.spp,but was positively correlated with the number of Actinobacteria and the number of Gammaproteobacteria.Also,the type of dominant soil bacteria did not change,but their quantitative structure varied over time.Owing to Firmicutes are suitable for growth in the absence of water and extreme environments,but Proteobacteria is conducive to soil nitrogen and energy cycling.Therefore,the soil quality was improved by adjusting soil bacterial community structure and shorten the recovery period.