Abstract: In order to reveal the higher content of total soil potassium and the lower content of available K and slow available K of soil in Longhui, and explore the influencing factors, traditional statistical method and geostatistics were adopted to analyze 488 soil samples in 2012. Results showed that: (1) the average content of total potassium in Longhui was 27.0 g/kg, which belonged to high level; and the average content of available K and slow available K was 91.8 mg/kg and 254.8 mg/kg, respectively, which belonged to low level; (2) despite the large distribution of suitable content of slow available K in the middle part of Longhui, most of the rest tobacco planting towns had low level of slow available K; (3) available K and slow available K had a highly significant difference among different soil textures and types, the regression equation between available K, organic substance and pH was: Yavailable K=0.788Xorganic substance 65.51, R2=0.9918** and Yavailable K=6.04 XpH 55.40, R2=0.9798**, respectively; (4) K fertilizer effect was better in middle clay, loam soil, lime soil, red soil and paddy soil, and the content of soil organic matter and pH should be improved as much as possible in a suitable range.