Abstract: Spatial distribution pattern analysis was used to describe distribution patterns of Seriphidium transiliense seedlings. Seedlings had a clumped pattern of distribution in May and September both inside and outside the fenced area, but the degree of aggregation was different due to the spatial heterogeneity of the environmental conditions; the IWAOY regression and TAYLOR principle analyses of the spatial distribution of indicators in line gave the same results. The sampling area of S. transiliense seedlings was 4 m²; DCCA and correlation analysis showed that the number of seedlings was positively correlated with environmental factors, and that the seedling populations could be classified into four categories according to the habitat conditions. There were huge differences in the numbers of surviving seedlings at different times under different habitat conditions: Large numbers of seedlings germinated initially and there was a high mortality rate in the summer, characteristics of “explosive emergence” and “sudden death”. Peak seedling emergence was in April in all four habitat conditions and was followed by sharp decreases in July and August with almost no surviving seedlings. The high mortality rate and a strong focus in time, were mainly due to intensive environmental selection and to competition.