Abstract: In order to study the problem of fertilization technology for treatment of the waterlogging flue-cured tobacco, the pot experiment was adopted to study the effects of different N source on growth of flue-cured tobacco under soil waterlogging in 2010. The results showed that soil waterlogging markedly lowered the plant height, the individual green leaf area, the growing rate of central leaf, the leaf N content and biomass. On any condition, the in green leaf area of flue-cured tobacco in condition of 1/2NH₄⁺-N+1/2NO₃^--N, its growing rate of central leaf and its biomass were greater than those of NO₃^--N and those of NH4 +-N. The addition of NH4 + nutrition seems to enhance the sensitivity of flue-cured tobacco growth. The sensibility of different organ in flue-cured tobacco plant to soil water logging were different: leaf＞stem＞root.