Abstract: The solution culture with nutrient deficiency was used for Eucalyptus seedlings in this experiment.The results are shown as follow:a) Eucalyptus seedlings are sensitive to the deficiency of N,or P,or K.Typical symptom can be shown in 25 days.After 35 experimental days,the dry-weights of the seedlings which are deficient in N,or P,or K are 30~33,27~42,and 40~43 percent of that in the full nutrient solution,respectively.b) The seedlings deficient in Ca,or Fe,or Trace elements (B,Mn,Cu,Zn,Mo) also have themself’s symptom.But no symptom was found for the seedlings deficient in s during the period experiment.It is noticeable that Eucalyptus seedlings are sensitive to Mg deficiency,and [the symptom of Mg deficiency is typical.It happens very scarcely in solution culture with nutrient deficiency.