Rainfall erosivity, which stands for potential ability of soil erosion inducing by rainfall, is one of the major indictors inthe water and soil conservation study. For best understanding the effects of the different artificial vegetation restoration methods onthe side slope of mine dump, this paper analyzed the relation between slope erosion and rainfall erosivity. The results show thatthe erosivity was significantly influenced by trees with shrub and grass and the shrub with grass, and slope runoff depth were42.9% and 52.6% of the contrast plots respectively. Three collocations had significantly decreased the effect and the amount was2.3%-6.7% of that in the contrast plot. There was a positive correlation between the erosivity and the runoff and the amount, andthe runoff response to the erosivity changing was more quickly than the amount.