Abstract: The cultivation and screening of rice varieties suitable for cultivation in saline-alkali land in Dingbian County,northern Shaanxi is of great significance for the utilization of saline-alkali land and the improvement of the ecological environment.A field experiment was carried out in Yingpanliang Village,Duiziliang Town,Dingbian County.Four treatments T1,T2,T3 and T4 were set up,namely Longyou 619,Ningjing 28,Dongdao No.4,and rice FL478.Well water was used as irrigation water sources to study the effects of different rice varieties on the physical and chemical properties,nutrients,soil ion changes,rice growth status and yield of saline-alkali soils.The results show that compared with that before rice planting,the soil pH value and total salt content of each treatment decrease to different degrees （P＜0.05,P＜0.01）.After planting rice,each treatment promotes the reduction of soil clay content and the increase of silt content,while the sand content decreases.The soil organic matter content and total nitrogen content of each treatment increase to different degrees （P＜0.01）,but the contents of available phosphorus and available potassium decrease significantly （P＜0.05）.The organic matter content of soil tillage layer in treatment T1,T2,T3,and T4 increases by219.87%,398.34%,218.91%,and 277.53%,respectively,and the total nitrogen content increases by 150.00%,300.00%,160.71%,and 29.23%,respectively.Compared with the background value,the contents of Ca²⁺,Mg²⁺,Cl^-,SO^2-₄and HCO^-₃in each treatment decrease by 46.76%,63.78%,33.91%,63.78%and 43.18%,respectively.Planting rice has a significant effect on soil desalination.The relationship between each treatment and rice plant height growth and number of ears per m~2is statistically significant （P＜0.05）.There is significant different in 100-grain mass quality and yield between treatment T1 and rice planted in saline-alkali land （P＜0.01）.Treatment T1 improves by4.96%,42.78%and 161.64%compared with T2,T3 and T4,respectively.Longyou 619 and Ningjing28 have higher rice yields and are more suitable rice varieties for planting in saline-alkali land in northern Shaanxi,and can be promoted in northern Shaanxi.