Abstract: To reveal the interspecific relationship and niche characteristics of the dominant species of herb communities under different vegetations on the reclaimed coal gob pile, based on the plant plot sampling, we analyzed the interspecific relationships of 12 dominant species under different vegetations revegetated in 2003 on the reclaimed coal gob pile in No. 5 mine in the Yangquan mining area of Shanxi by the methods of χ2 test, Pearson correlation coefficient, Spearman rank correlation coefficient, niche breadth and overlap. The results showed that: (1) the positive and negative correlation ratio of the 12 dominant species of herb community under different vegetations was less than 1, and there were negative correlation among the whole 12 dominant species, and there were few species-pairs with very significant and significant correlations, the relationship between the species was loose and the correlation was poor; (2) the 12 dominant species under different vegetations were classified into 3 ecological species groups, and soil moisture was the key environmental factor resulting in the differentiation of these species groups; (3) the interspecific relationship was consistent with the value of niche overlap, while there were no direct linear relationship between their niche breadth and overlap; (4) the naturally colonized plants such as Bothriochloa ischaemum, Artemisia capillaris and Heteropappus altaicus had strong ability of ecological adaptability and survival competitiveness to bear the poor habitat of coal gob pile. The stability of the herb communities on the reclaimed coal gob pile in the Yangquan mining area of Shanxi is poor, and the herb communities are still in the early or middle stage of succession. The naturally colonized herbaceous plant B. ischaemum, as a best pioneer species, could be recommended for revegetation of local coal gob piles, but it has negatively interspecific relationship with the planted Festuca elata, and thus the two could not be recommended as species-pairs for mixed planting revegetation of local coal gob piles.