In order to explore the distribution characteristic of salinized soil salinity and organic matter content in the Hetaoirrigationarea，a typical area of salinized soil in WuyuanCounty，Bayannaoer City was selected as the researcharea，regional soil information was used for site-specific monitoring，and 149 sampling points were collected for different profiles.Thespatial variability of salinized soil salinity and organic matter content were studied by using classicalstatistics，geostatistics，spatial interpolation and other methods.The results showedthat:With the increase of soildepth，the correlation between soilorganic matter content and soil salinity content increasedgradually.The influence of salinity on the organic matter content inthe deeper soil layer was greater than that of the surfacelayer，and the effect was the most significant at the depth of 40～ 60cm.The optimal semi -variance function model of each layer of soil salt in the study area was the Sphericalmodel，and the optimal semi-variance function model of the soil organic matter was the Gaussianmodel.After the large -scale improvement of saline-alkali land，the soil salt structure ratio(representing the proportion of the spatial variation caused by random factorsin the total systemvariation)of 0～20，20～40，40～ 60 cm layer increased by2.35，6.72，1.94 percentagepoint，andthe soil organic matter structure ratio of 0～ 20 and 20～ 40 cm increased by3.54，3.93 percentagepoint，respectively，thestructure ratio of soil salinity and organic matter showed an upward trend compared with that before theimprovement.Thevariability of soil salinity in the vertical direction was stronger than that of organicmatter.During the improvementperiod，the average soil salinity content decreased by 0.574g/kg，and the average soil organic matter content increased by 0.195g/kg；The soil salinization of the cultivated layer wasweakened，the organic matter content of each layerincreased，and the cropgrowth safety zoneincreased；The soil environment in the district had improvedsignificantly.Areas with high soil salinity(>6g/kg)are mostly located in the middle and southeast of the shallow groundwaterarea.Afterimprovement，the characteristicsof soil salt accumulation in the middle of the study area are still verysignificant，and there is a risk of increasingsalinization， which is still a key area for improvement and prevention of saline-alkalisoil.