[Objective] The variation of climate elements and distribution of dry-wet status in Wei River basin were studied to support decision-making in disaster prevention and reduction.[Method] Based on observation data at 21 meteorological stations in Wei River basin from 1960 to 2010 for a total of 51 years,potential evaporation and aridity index were calculated using Penman-Monteith model.Variations in climatic elements,aridity index and dry-wet status were investigated by climatic trend rate,Mann-Kendall method,R/S method,wavelet analysis method and moving average method.[Result] (1) The precipitation decreased by 1.69 mm per year and the potential evapotranspiration increased by 0.24 mm per year.The changing periods of precipitation and potential evapotranspiration were 17 years and 28 years,respectively.The spatial distributions of precipitation and potential evapotranspiration were different,and they decreased from the southeast to the northwest of the basin.(2)The aridity index increased by 0.005 per year,and the increasing trend had a positive sustainability.The dry-wet status had periods of 8 years and 28 years.The climate became drier from the southeast to the northwest.(3)The most humid year would occur in 2024,and the driest year will be 2019 in the basin. [Conclusion] The precipitation was decreasing,the potential evapotranspiration was increasing and the climate was becoming drier in recent years.Thus,measures should be taken to reduce the adverse effects of drought and waterlogging disasters.