To investigate the source of sand material and estimate the amount of surface dust released within different regions of the Badain Jaran Desert, this study conducted field surveys and collected soil samples at 0–20 cm and 20–40 cm soil depths from eight surrounding sites. Here, we analyzed grain size composition characteristics at these different soil depths and corresponding depositional environments. Results showed that: (1) Sediment in the desert’s surrounding areas was predominantly composed of fine sand. As indicated by grain-size parameters, sorting coefficients ranged from 0.81 to 1.58 (0–20 cm) and 0.85 to 1.51 (20–40 cm), covering categories from moderate to poor sorting. Skewness was predominantly near symmetrical, and kurtosis was predominantly leptokurtic. (2) The relationship between sorting and mean grain size varied among different regions. Sorting improved with finer grain sizes at sites 1, 4, and 8 while deteriorating with finer grain sizes at sites 2, 3, 5, 6, and 7. Skewness increased as mean grain size increased, while kurtosis evolved from narrower to wider peaks as grain size became finer. (3) Grain size of parameter characteristics at some sites(site 2,6) were characterized by a decrease from northwest to southeast. This discrepancy is mainly attributed to local topographic variations and vegetation cover, which alter sand grain composition. (4) Depositional environments, represented grain size characteristics in the surrounding areas of the Badain Jaran Desert, are primarily dominated by turbidity currents (34.38%), aeolian processes (26.56%), and fluvial environments (21.88%). Further analysis is necessary to explore differences in geochemical trace elements as well as other aspects associated with specific source area material throughout this desert.