The purpose of this paper is to investigate the scientificity and rationality of the three-tier alertsystem" threshold settings for heavy precipitation weather in Hezhang County and make the system more in line withthe local realities in Hezhang County. By using the precipitation data of 10 disastrous severe precipitation and thedisaster information in Hezhang County from 2013 to 2022, and the mathematical statistical analysis method, thispaper analyzes the threshold values of the " three-tier alert system" of meteorological service mechanism for heavyprecipitation weather in Hezhang County and provides suggestions for improvement. The analysis results are asfollows: (1 ) T''he overall precipitation in Hezhang County exhibits a trend of less in the northwest and more in thesoutheast , while the maximum houny precipitation generally shows a distribution of more in the northwest and lessin the southeast. (2 ) Disaster-causing severe precipitation in Hezhang County is mainly distributed in Dezhuo,Hezhen , jiegou , Kele , Fuchu , Anle in the northern part, Caishen, Dayi in the central-eastem part, and Weishe.Zhushi, Songlinpo in the southeastern part. The duration of the disaster-causing intense precipitation is approximately 6 hours. (3 ) The primary period of heavy precipitation in Hezhang County is from 15 :00 to 06 :00the next day. (4 ) Townships in the northern paut of Hezhang County have weaker disaster-bearing capacities, whilethose in the southeast have relatively stronger capacities. (5 ) When the hourly precipitation in the jurisdictionreaches 30 mm or more, and heavy rainfall is expected to continue, the fourth-level alert is iniiated. When theaccumulated precipitation at a station within the jurisdiction reaches 50 mm in 3 h or 70 mm in 6 h or more, andprecipitation is expected to continue, the third-level alert is initiated. When the accumulated precipitation at astation within the jurisdiction reaches 80 mm in 3 h or 100 mm in 6 h or more, and precipitation is likely tocontinue , the second-level alert is initiated. When the accumulated precipitation at a station within the jurisdictionreaches 130 mm in 6 h or 200 mm in 12 h or more, and precipitation is expected to continue, the first-level alert isinitiated. To sum up, this paper cleary deines the reasonable thresholds for the "three-tier alert system" for severerainfall weather in Hezhang County, and could provide a support for enhancing the local capacity to respond tometeomlogical disasters.