The invention provides a screening method for saline-alkaline tolerant rootstock of red jujube in an arid desert area. According to the screening method, wild jujube seedlings produced by asexual propagation are used as a test material to simulate a mixed salt and alkali test in a field. By processing the appearance indexes of the wild jujube root seedlings of different varieties, measuring the physiological indexes of the leaves, analyzing the relationship between the multiple indexes of the wild jujube root seedlings and saline-alkaline tolerance under the mixed salt-alkali conditions, and finally carrying out comprehensive evaluation on the membership function, the wild jujube varieties with high salt-alkali tolerance are screened out. The screening method provides a solution for red jujube cultivation in south Xinjiang areas for solving the problems of low resistance, low survival rate, uneven yield, uneven fruit size, poor quality, lower commodity rate and the like in plant growth, which are caused by large difference in stock. The screening method for salt-tolerant rootstock of red jujube has the advantages of simple and convenient plant cultivation method, scientific screening method, high efficiency, accurate results and the like, and fills the blank in related research field.