Based on meteorological observation data from 1961 to 2012 at Huajialing, Anding and Tongwei stations and forest resources inventory data of Gansu Province, climate characteristics of the Huajialing over the past 50 years and its influences on the protective forest construction were analyzed using trend analysis and accumulative anomaly analysis methods. Results showed that decreasing rate of annual mean precipitation in the region over the past 50 years was -2.467 mm/a, increase rate of annual mean temperature was 0.024 2℃/a, and regional climate showed a typical development trend to warm and dry. Lack of precipitation was an important natural factor for the formation of inefficient protective forest in the Huajialing, while warm and dry climate change exacerbated adverse effects of arid climate on the local rainfed forestry and ecological environment construction.