Continuous cropping could debase the tobacco quantifies and qualities, which had become the bottleneck of tobacco development in China. The mechanisms of continuous cropping obstacles were reviewed with regards to soil nutrient unbalance, accumulation of allelopathical and autotoxicity substances in roots exudates, and deterioration of soil biological environment including the soil enzymatic activity and the soil microbialflora. The countermeasures to control the obstacles of tobacco continuous cropping were also presented. Possible future researches on continuous cropping obstacles of tobacco were also proposed in this paper．