Loess sediment in the margins of desert, sensitively recorded the climate changes of its source desert area. In this study, a BL section (39°24'10.98"N, 94°16'00.12"E; 2737m a.s.l.) that locates in the northern slope of the Altun Mountain and downwind direction about 25km from the edge of Kumtagh Desert, was used to reveal the environmental changes of Kumtagh Desert since the Holocene in the West China. Based on the analysis of sediment particles, geochemical element characteristics, and OSL age. Our results show: 1) 93.34% of the BL section sediment particles are belong to silt sand and coarse sand; 2) this sedimentary strata deposited since about 8.3 ka B.P. and formed in the convex terrain environment conditions after the glaciers melting during the Early Holocene in the eastern part of the Altun Mountain. Its mean depositing rate is about 4.22cm/100a, but the rate decreased with time; 3) the loess sediment was orgined from the Kumtagh Desert including the surface material or internal exposed strata during the Holocene, because they have similar element ratio distribution patterns. Our results proved the baseline for reconstructing the detail climate changes of the Kumtagh Desert since the Holocene in the future.