Abstract: Pot experiments were conducted to investigate the changes of characteristics of growth response and accumulation of uranium in Brassica juncea under different uranium concentration (0，1，5，20 mg/kg) stress.The results show that：uranium has little effects on early growth age of Brassica juncea.The longer the growth time，the higher the stress concentration of uranium，and the more obviously the growth status being affected; Low concentration of uranium stress can stimulate synthesis of chlorophyll and soluble protein in Brassica juncea，while with the increase of the concentration of the uranium，chlorophyll and soluble protein in Brassica juncea decrease dramatically; Uranium stress lead to the content of membrane lipid peroxidation products MDA in Brassica juncea increasing with the concentration of uranium in soil，so uranium significantly affects membrane lipid peroxide in plant leaves; Uranium enrichment quantity increased with uranium concentration in the soil，and the roots have a higher uranium enrichment capacity than that of the stem leaf.Therefore，Brassica juncea has potential application value in phytoremediation of soil contaminated by uranium.

Key words: Brassica juncea, Uranium, Growth response, Accumulation characters