The study compared the characteristics of loess and reworked loess in Yili area, Xinjiang. The researchers found that while the grain size composition of both types is similar, the amount of sand in loess is higher and clay is lower compared to reworked loess. The frequency curve of both types follows a positive normal distribution, with the mode falling in the 15-30μm range. However, the percentage of particles in this range differs between loess and reworked loess. Additionally, the sorting of loess is better than reworked loess, with loess showing lower skewness values. Overall, the findings suggest that the loess in Yili area is a typical eolian deposit, indicating it was transported and sorted by different processes before being deposited.