To explore the temporal and spatial characteristics of available boron，and to provide scientific basis for the management of boron nutrition in Xiangxi tobacco region，the soil samples were collected and the content of available boron was measured in 2000 and 2015，respectively.The temporal and spatial variation of available boron in the area and its influence factors were analyzed by the methods of classical statistics and geostatistics.The results showed that the average amount of available boron increased from 0.21 mg/kg in 2000 to 0.64 mg/kg in 2015，the increase rate was 204.76%. The area of “suitable” and “high” grade of soil available boron in 2015 increased significantly by 73.27% and 18.39%，respectively，while the “low” level dropped sharply by 91.19%.Altitude，organic matter，land use，rotation，topography and soil parent material all had significant effects on soil available boron content.Altitude had the greatest explanatory power，which could explain 10.2% of soil available boron variation，and the independent explanatory power of soil parent material was the smallest，explaining only 2.4% of soil available boron variation，and the accumulation of 6 indicators can explain 26.5% of the variation of soil available boron.