Abstract: In order to research the leaf dust retaining capability of different planting areas, the authors took Korla fragrant pear as the study subject, and analyzed the characteristics of dust particle of leaf surface by using scanning electron microscopy and measured dust retaining capability by weigh method. The results showed that the order of natural descended particle of three townships in Korla was Puhui [(4.693 ± 0.555) mg/cm2] ＞ Shanghu [(1.866±0.281) mg/cm2]＞ Harayulghon [(1.580±0.186) mg/cm2], and the order of dust retaining capability was Harayulghon (4.555 mg/cm2)＞ Shanghu (3.422 mg/cm2)＞ Puhui (3.369 mg/cm2). The relation between natural dust- fall amount and leaf dust retaining amount showed that the monthly dust retaining amount of leaf was more than monthly natural dust-fall amount, indicating that the leaf of Korla fragrant pear could easily absorb dust and sand.