Abstract: Based on the hourly visibility, relative humidity and temperature data of 156 stations in Sichuan from 2016 to 2019, the temporal and spatial distribution characteristics and the corresponding meteorological parameter values were analyzed. The results showed that there were significant differences in the spatial distribution of haze weather in Sichuan. There were less occurrences in the western Sichuan Plateau and Panxi area, and more in Basin. In terms of seasonal variation, haze weather occurred frequently in winter, followed by spring and autumn, and the least in summer. From the daily change, the number of haze in the daytime was much higher than that in the nighttime, the high incidence stage was from 11:00 to 21:00, and the low incidence stage was from 03:00 to 08:00. The haze was the most during 10:00~12:00, the haze was less during 01:00~7:00 and at 23:00. At 20: 00 and 23: 00, the haze elimination was the most. During 06~09: 00, the haze elimination was the least, about 90 % of the haze dissipated within 8 hours. Combined with the analysis of meteorological factors, the number of haze was the most when the temperature was between 7°C and 14 °C. According to visibility, there were more occurrences of light haze and light haze, and less occurrences of severe haze; the occurrence frequency of haze was the lowest when the relative humidity was between 2 % and 33 %, and increased with the increase of relative humidity when it was between 34 % and 79 %.