Abstract: The author analysized the grainness of sands and identified the mineral composition of sands in Takel Mukul Desert, Hi District, and dispussed the characteristics and origin of sand grains of the desert. The analysis shows that the two major types of sand grains, aqueous and aeolian sands, are characterized by obvious differences on their grainness. On certain scale, aeolian sands contain aqueous trace, i.e. is characterized by in-heritablity. The mineral composition of the two kinds of sands is. similar and their distributive ratio occupy approximately, same,:percentage, and there is less difference on their surface textures. It is evidenced that aq-ueous sands and aeolian sands are interrelated per se, namely, they, originated from same sand source. The aqueous sands came from Tian Shan Mt, and was moved downhill by runoff to Hi Basin and then transported by water into Hi Riven the aeolian sands are formed locally from aqueous sands while they are accumulating.