Abstract: Xinjiang is a typical irrigated agricultural area, and water-saving irrigation technology is the basis for the sustainable development of agriculture in Xinjiang, but there are some differences in the effects of different long-lasting irrigation methods on soil particle size composition and pore structure. In order to investigate the effects of different irrigation methods on soil particle size composition and pore structure in the root zone of jujube trees, the soil of jujube gardens with three different irrigation methods (FI: diffuse irrigation, DI: drip irrigation, and STI: sandy tube irrigation) in the southern Xinjiang area was used as the object of study for 14 years. Soils in the unirrigated area and far away from the root zone were used as the control, and the soil was analyzed with the combination of soil particle size distribution (PSD) and soil water-saving irrigation techniques, and the soil was analyzed with the combination of soil water-saving irrigation techniques. The study determined the soil particle size composition by particle size distribution (PSD) and CT scanning techniques and its connectivity pore structure parameters were analyzed. The study aimed to reveal the soil structural characteristics and provided a microscopic theoretical basis for water-saving irrigation technology in Xinjiang. The results showed that: 1) the effects of different irrigation methods on the particle composition of soil layers were significant (P＜0.05). The average volume fraction of soil powder particles was significantly higher in the diffuse irrigation than in the drip irrigation and sand-pipe irrigation, and the long-term drip irrigation and sand-pipe irrigation methods decreased the content of soil powder particles in each layer from 0 to 60 cm and increased the content of soil sand particles. 2) the long-term diffuse irrigation method significantly increased the average volume fractal dimension of soil from 0 to 60 cm (P＜0.05) and the average volume fractal dimension of soil from 0 to 60 cm was significantly higher (P＜0.05) and the soil was more compact and less permeable. Long-term drip irrigation and sand pipe irrigation decreased the average volume fractal dimension of 0-60 cm soil. 3) The frequency of 0-20 cm pore size interval (0-1000 μm) was higher than that of drip irrigation and diffuse irrigation under sand pipe irrigation. The total porosity and pore connectivity of the soil from 0 to 40 cm were significantly higher than those of the diffuse irrigation method (P＜0.05), and the total porosity and pore connectivity of the soil from 0 to 20 cm were significantly higher than those of the drip irrigation method, and the permeability of the soil was better. In conclusion, the sand pipe irrigation method was more suitable for the irrigation of jujube trees in this area. The results of the study provide theoretical references for the development of water-saving irrigation and efficient utilization of agricultural water resources in South Xinjiang.