Drought is one of the most complicated disaster, its adverse effects on dryland agriculture are more pronounced than other sectors.. The aim of this study was to investigate the drought situation in the Simineh river basin watershed at four stations Synoptic Bukane, Mahabad, Miandoab and Saqez conditions for moisture content of wheat dried grapes in the four years 2007-2010 were analyzed and analyzed to determine the drought stress on the yield of wheat from the 22nd to the 43rd week in the light of the growth and development of rain fed wheat in the region The study was conducted weekly using Palmer's Moisture Index (CMI).. CMI results indicate that in the period of grain filling between 20May and 15June, there is a negative moisture drought index (CMI), which indicates the effect of drought on the performance of the wheat field. Drying plant is in good moisture conditions, but the stations of Bookan, Mahabad and The midsection is tense and the amount of moisture in 2010 is negative in all stations and the area is in severe drought.