To assess the current contents and spatial distribution soil available silicon (Si) in tobacco fields in Liupanshui City to guide the rational application of Si fertilizer, 100, 220 and 180 topsoil samples (0-20 cm) of tobacco fields before the transplanting and fertilization of tobacco were collected from Zhongshan, Shuicheng and Panzhou, the three tobacco regions in Liupanshui City in March of 2020. Soil available Si contents were determined and their abundance or deficiency was assessed according to the grade standard for tobacco-planting suitability, the maps of soil available Si content and grade were drawn on the ArcGIS platform and its spatial distribution characteristics were analyzed. The results showed that in the three tobacco regions, soil available Si content ranged from 18.86 to 754.71 mg/kg, the mean content ranged from 260.88 to 403.80 mg/kg, all belonging to the high grade (≥ 150 mg/kg). The fields with high Si content in the three regions accounted for 83.33%-99.09% of their total number of tobacco fields. Spatially, soil available Si content generally decreased from west to east in the whole city, and the fields with the low available Si content (<100 mg/kg, only 1.4% of the total number of tobacco fields) concentrated in the central of Shuicheng. Soil available Si content had significant positive correlation with pH (P<0.01), organic matter content and clay contents (P<0.05), but a significant negative correlation with silt content (P<0.05). Therefore, most tobacco fields in Liupanshui City do not need applying Si fertilizer, but for the tobacco fields insufficient in Si, the measures should be taken such as applying Si fertilizer or modifying soil acidity and increasing soil organic matter content to increase Si bioavailability in soils.