Soil and water conservation effects of the vegetation at different levels(aboveground and underground parts of shrub and herb layers) were investigated under field simulated rainfall of 0.5 mm/min rainfall intensity and successive 30 min rainfall duration on spoil slope with shrub-grass covered in Beijing Shouyun Iron district. Results showed that vegetation which plays an important role in soil and water conservation reduced surface runoff of 57.65% and soil loss of 93.55%. The effects of impoundment and erosion reduction by shrubs were 7.4 times and 30.9 times the effects by herbs,respectively. This was not only relevant to major ratio of shrubs in the vegetation,but also relevant to morphological structure of shrubs. The impoundment effect of the aboveground part of vegetation was 1.65 times the underground part of vegetation,which indicated that the aboveground part of vegetation played a great role in water conservation. While the erosion reduction effect of the underground part of vegetation was 1.52 times the aboveground part of vegetation,which illuminated that the underground part of vegetation played a great role in soil reinforcement.