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The influence of meteorological conditions on the occurrence and development of tobacco mosaic virus(TMV) in Northeast Fujian is analyzed.The results suggest that some meteorological factors such as temperature,moisture,rainfall and sunshine have remarkable effects on TMV occurrence and development;but the degree of the effects and the key influencing periods are different.The most effective factors are moisture and rainfall,then temperature,and the least is sunshine.Temperature plays a major role,and minimum temperature has the most important role at the beginning of TMV attack;the moisture and the rainfall play a key role and sunshine has an obvious negative role during the prevailing period.A mid-term forecast model of TMV occurrence is developed and some prevention suggestions are presented.