Abstract: Based on the analysis of the rainstorm and flood disasters in Macheng area, combined with the field investigation, the precipitation characteristics of Macheng“7.1”rainstorm during the June 30-July 2 in 2016 and its impact on PV power station were studied by using climate statistical analysis method and extreme value I distribution theory.We explored the genetic mechanism of flood disasters and some measures for preventing the flood disaster in PV power station.The results show that:(1) Influenced by southwest jet, the process rainfall of Macheng National Meteorological Station is 433.1 mm, and the“7.1”rainstorm process reaches the extremely heavy rainfall level.(2) Daily precipitation is 333.6 mm at Macheng Station on 1 July 2016, and it ranks the first in the history of maximum daily precipitation over the years, with a recurrence period of 367 years.The cumulative precipitation is 155.2 mm from 19:00 to 22:00 on 30 June 2016, and it ranks the first in the history of maximum 4 h continuous precipitation, with a recurrence period of 51 years.(3) During the“7.1”rainstorm period, the level of Macheng’critical precipitation index of mountain torrent (debris flow) disaster grade prediction stations in five regions of Hubei Province is R3, which is very prone to mountain torrent geological disasters.Large-scale heavy rainfall led to a rise abruptly of the water level of rivers in Macheng in a short time, and the limited water level of reservoir in flood period was exceeded.In addition, the water conservancy and flood control facilities are inadequate.That caused severe floods disasters and a PV Power Station was flooded with huge economic losses.