Abstract: During the growing season of 2012, Stemflow of two dominant plant species, Haloxylon ammodendrom and H. persicum, was studied in Gurbantonggut Desert, Northwestern China. We firstly selected some trees of the two species to be standard tree and surveyed the size of canopy, and then measured the stemflow after every storm of single precipitation. It was showed that the stemflow both emerged when rainfall lager than 2.4 mm for the two species. It was demonstrated that the stemflow increased with the volume of canopy until larger than 4.0 m³ for H. ammodendrom and 1.5 m³ for H. persicum,respectively. Then, it kept invariant and even began decreasing. There was a significant positive correlation of the two species between the size of single rainfall and the stemflow following. To sum up: the accumulated stemflow volume of the two plants proportioned 9.1% and 6.4% of the total rainfall, respectively. The funneling ratio of the two species both increased with the size rainfall. Consequently, the stemflow of H. ammodendron and H. persicum could be effectively funneled down into the soil around the base of stems to collect water to take up, especially for the former in Gurbantonggut Desert.