Based on the census data of the quality of tobacco leaves,the distribution characteristics of the content of potassium in the flue-cured tobacco in the tobacco growing areas in Qujing were analyzed with a method of geostatistics,and by means of variance analysis and dummy variable regression analysis the main controlling factors affecting the potassium content of flue-cured tobacco were discriminated from 19 natural fac-tors.The results showed that the mean potassium content of flue-cured tobacco grown in Qujing was 1.65%,the potassium content in 94.60% of the tobacco leaves waw less than 2.0%...