Abstract: 【Objective】 Soil nutrient resource is an important factor to determine the settlement of plants. The study of the effects of heterogeneous habitats on the growth of Achnatherum inebrians, the common poisonous plant can provide a basis for exploring its growth adaptation mechanism and diffusion early warning. 【Method】 In this study, three small scale heterogeneity habitats were selected from the typical spreading areas of the A. inebrians in the middle section of the northern slope of the Tianshan Mountains in Xinjiang, and the relationship between growth dynamics and soil nutrients was studied. 【Results】 The growth characteristics of A. inebrians in the three habitats showed a trend of increasing first and then decreasing. which was consistent with Logistic growth curve. The slope direction had a significant effect on the plant height from May to June (P<0.05), but had no significant effect on plant height, plant diameter and tiller number in other months (P> 0.05); Soil nutrient contents of organic matter, hydrolysable nitrogen, and available potassium in shady slope were significantly higher than those in the bottom and the sunny slope (P<0.05), but there was no significant difference between gully bottom and sunny slope (P> 0.05); only the plant height of A. inebrians from April to June had significant correlation with soil nutrients (P<0.05), that was, the high soil nutrient content inhibited the growth of the plant height of A. inebrians and the other growth characteristics had no significant correlation with the soil nutrient (P>0.05). 【Conclusion】 In conclusion, under the small scale heterogeneity environment, the slope direction could affect the growth of plant height and soil nutrient content in tiller and jointing stage, but it could not change the general trend and intensity of growth in the year.