Abstract: In order to lay the foundation of the rational utilization of Cu fertilizer and offer data for the study of heavy metal harm on sugar beet (Beta vulgaris L.), Cu absorption characteristics, tolerance and the harm of excessive Cu were studied. The sugar beet was treated with nutrient solution of 0.31, 5.0, 50.0 and 100.0 μmol/L Cu2 in hydroponic culture and the effect of excessive Cu was studied. The results showed that: (1) the seedling color turned from green to yellow and the fresh weight of root and leaf became smaller with the increase of Cu2 ; (2) with the increase of Cu2 , the content of Cu, Zn, Fe, B and Mo in root increased, but Mn dropped and then increased lightly, the content of Cu, B, Mo in leaves increased, Zn and Mn increased first and then dropped, Fe had no significant variation; (3) with the increase of Cu2 , the content of N, P, Ca and Mg increased, K first increased and then dropped. The content of total N, P, K, Ca and Mg in leaves showed an increase trend. The content of N in root and leaf had no significant difference, but the content of other elements in leaf was higher than that in root.