Abstract: In order to determine the appropriate amount of nitrogen fertilizer for cabbage, the field plot experiment was carried out, and four treatments were set up: no nitrogen application (T1, the control group), optimized nitrogen application (T2), 70% optimized nitrogen application (T3), and 130 % optimized nitrogen application (T4). Among them, the T2 treatment was applied with pure nitrogen 240 kg·hm⁻², P₂O₅ 84 kg·hm⁻², K₂O 216 kg·hm⁻². Then, the effects of different nitrogen application rates on the agronomic traits, fresh yield of cabbage, absorption of nitrogen, phosphorus and potassium, and agrochemical characteristics of soil in the cultivated horizon after harvest were studied. The results showed that compared with T1 treatment, the other fertilization treatments increased the plant height, DBH and fresh weight of cabbage to a certain extent. The trait performance such as the agronomic character, nitrogen and potassium absorption, and yield of cabbage treated with T2 were the best. Therefore, it was recommended that the appropriate amount of nitrogen fertilizer for cabbage planting was pure nitrogen of 240 kg·hm⁻². The results could provide reference for the scientific fertilization of cabbage.