This paper uses the daily precipitation, hourly precipitation and disaster data of the Yuping County National Station and the township assessment site from 2014 to 2020 to analyze the rainfall characteristics of Yuping’s regional rainstorm weather and the disaster-causing rainstorm weather process. The threshold value of “Three Call Response” is tested, and the threshold of “Three Call Response” of the townships is refined. The results show that: (1) The annual heavy rain in Xindian has little change from year to year, and Tianping has the largest change, followed by Zhujia; (2) The frequency of heavy rain in the whole county is higher from May to July, reaching the peak in June, while the peak of the number of heavy rains in Zhujiachang occurs in July; (3) In all regional heavy rain, short-term heavy rain mostly occurs at night, which can be divided into continuous precipitation or gentle precipitation to cause disaster, heavy rain superimposed disaster, and short-term heavy rain. When precipitation occurs in Yuping for more than 4 consecutive days and the accumulated rainfall reaches about 100mm, or the precipitation lasts for 5 to 9 hours at about 10mm per hour, disasters may occur.Heavy rain superposition is divided into space superposition and time superposition. If the interval between two heavy rains in Yuping's jurisdiction is too short, the current interval is determined to be 1 day, which will easily cause related disasters. The spatial superimposition is that there will be a 50mm precipitation in the middle and south of Yuping for 3 hours, and there will be heavy rain in the upper reaches of Cengong, and there will be a disaster in the middle and south of Yuping.(4) According to the disaster situation and the rain intensity of each town’s heavy rain duration, the“Three Call Response” thresholds were tested. The disaster-causing rain intensity of the townships is not uniform. Therefore, the“Three Call Response” thresholds for each town were established, and 3h is called the response threshold, which is 40mm ~ 60mm .