Abstract: In order to invest the pollution of plants and soil in the surrounding green belt by the application of de-icing salt in the winter of 2023 and spring of 2024 on the main traffic arteries in the city, this study detected and analyzed the plant phenotype, leaf nutrient content and soil soluble salt content of the green belt of the main traffic arteries in Beijing in the spring of 2024. The results show that road green belt plants are generally dry and even die after being polluted by de-icing salt; the content of Na⁺ in the leaves of contaminated plants increased significantly, while the contents of K⁺, Ca²⁺ and Mg²⁺ showed different absorption and response mechanisms in different plant varieties; the soil soluble salt of the road green belt seriously exceeds the standard; the surface soil(0-20 cm) ranged from 0.04% to 25.85%. Among them, 75.0% exceeded 0.30%, and 95.3% exceeded 0.10%; the soil soluble salt of the lower soil (20-40 cm) ranged from 0.03% to 1.48%. Among them, 50.6% exceeded 0.30%, and 81.6% exceeded 0.10%. Based on the assessment of the impact of chloride-type snow melting agents on the pollution of green belt plants and soil, suggestions for the rational and effective application of snow melting agents were proposed.