Abstract: ObjectiveTo explore the spatiotemporal distribution characteristics and trends of centenarians in Hechi.MethodsSpatial database of centenarians in Hechi City from 1982 to 2010 were established and analyzed by using the geographic information system software Arcgis 10.4 for Kriging interpolation analysis and trend surface analysis.ResultsThe proportions of centenarian in four censuses (1982-2010) in Hechi City were 3.59/10.5, 6.89/10.5, 8.43/10.5 and 12.50/10.5, respectively. The percentage of female centenarians was higher than that of male ones. The centenarians were mainly concentrated in three ethnic groups: Zhuang, Yao and Han. Among them, the number of centenarians in Zhuang and Yao accounted for 83.55% of the total centenarians. Centenarian ratio in Yao always maintained between 19.05/10.5 and 22.41/10.5. Most of the centenarians were illiterate. The results of Kriging interpolation showed that in the past thirty years, the longevity level in the southwest of Hechi(Bama, Fengshan and Donglan) was always higher than that in other areas. The CH value of the southwest of Hechi was increasing(up to 35.61/10.5) and the scope of areas with higher CH value was expanding. The trend surface analysis showed that the level of longevity in Hechi City gradually increased from east to west and weakened from south to north, though the trend in the north-south direction in 2010 showed a weak inverted "U" type.ConclusionAn obvious regional difference in longevity was observed in Hechi, and there existed a relatively stable longevity gathering area in the southwest of it. Factor analysis about longevity should be conducted based on the characteristics of spatial distribution and develop relevant health policies.