Taking Chinese cabbage as experimental material,the effect of iron-deficient stress and exogenous VC on physiological metabolism,and quality of vegetables were studied. As a result, it indicates that iron-deficient reduces the content of chlorophyll and the activity of NR?POD to greater extent,and results in reducing the content of protein, soluble sugar and VC,while remarkably increasing the content of nitrate; so the hygienic quality and nutritious quality of Vegetables are reduced. Exogenous VC to some degree ,reduces a series of bad effects of iron-deficient stress on vegetables.