The species diversity of different gangue piles at northern slope in Sunjiawan was studied with field investigation and statistical analysis.The results showed that obvious changes in species components of different gangue piles took place,from 5 species of 5 families at the initial stage of dumping gangue to 23 species of 7 families at the later stage,and from herb community to elm tree community.There was prominent positive correlation between diversity index,species richness index,Pielou evenness index and dumping years.However,there was prominent negative correlation between Alatalo evenness index and dumping years.