Abstract: In Jiangxi province tobacco leaves, especially lower leaves, have some problems, such as pale leaf color, thin leaves and low single leaf weight, which may result from soil magnesium deficiency. Field experiments were carried out to investigate the effect of different magnesium forms on tobacco growth, yield and quality in Jiangxi Province. Four different forms of magnesium MgSO4, Mg(NO3)2, MgCO3, MgO were used in the study. The results showed that compared with MgSO4 and MgCO3, Mg(NO3)2 and MgO could promoted the tobacco growth, enhance leaf area, leaf weight and the proportion of high quality leaves. In all these treatments, magnesium oxide had the best effect and the tobacco quality was also improved.