Abstract: In this paper， we analyzed the main soil nutrients of different soil layers in different vegetation patterns in Huanghuadianzi small watershed in Aohan County of Chifeng city. The result showed that in different vegetation patterns， the secondary forest, of natural bush had an obvious effect on the nutrient and concentration of organic. In the artificial forest， mingled forest had a better improving effect on soil than the pure forest, and natural grassland had the smallest effect. In the same vegetation patterns， organic， total nitrogen， available phosphorus， available potassium and microbial C presented an overall reduction trend with the deepening of soil layer, while pH presented an increasing trend except 40-60 cm soil layers.

Key words: small watershed, vegetation patterns, soil nutrients, Aohan County