The invention provides a method for screening salt-resistant sunflower varieties. The method comprises the following steps: selecting full and even complete seeds from the sunflower seeds of different varieties, and performing sand culture planting using the same planting matrix respectively; after seeding for a period of time, selecting the seedlings with consistent growth vigor and transplanting into an aerosol cultivation turnover box with 1/2 Hoagland nutrient solution to cultivate sunflower plants; selecting the plants with consistent growth vigor and single flower disc, recording the diameter X1 of the flower disc, and dividing the groups into a salt treatment group and a blank control group; performing aerosol cultivation of the blank control group using the 1/2 Hoagland nutrient solution; performing aerosol cultivation of the salt treatment group using the 1/2 Hoagland nutrient solution added with 120mmol/L NaCl; after the preset time, measuring the diameter of the sunflower disc of the salt treatment group and blank control group respectively; and screening out the sunflower variety with better salt resistance by analyzing and comparing the flower disc diameter data. With low cost, the method is easy to operate and facilitates promotion and implementation in various places.