Abstract: Along with the global climate warming, the rising temperatures, decreasing precipitation and light, heat, water allocation of climatic resources have taken place in significant changes at Tianshui Prefecture of Gansu Province since the 1990s, agricultural meteorological disasters such as drought, and low temperatures lead to fruit trees growth process and yield appear larger fluctuation, especially the apricot tree growth and development are more susceptible to the influence of the temperature rise caused by production due to the tall tree body, deep root system distribution and growth cycle is long. To achieve reasonable development of climate resources and effectively prevent meteorological disasters from the maximum losses or reduction fruit production, more studies on climate resources change impacting on the apricot trees yield nearly 30 a have been analyzed by statistical method. It is concluded that since 1990s the almond trees bud, budding and flowering period advanced 6-7 d in the 1980s, fruit ripening by around 10 d; Agricultural meteorological disasters occurring from early Autumn in late September to the next Winter in late January to early February, warm drought climate before flowers in early March and low temperature drought climate in early April of the flowering fruit bearing stage caused the greatest impacts on the almond trees yield, drought disasters in the later winter showed a trend of obvious increase for this century, other disasters were slightly reduced, but the damage was still significantly heavier than the 1980s; 10 a average climatic output dynamic relative percentage deviation(compared to the 1980s)decreased by 29.9% in the 1990s, reduced 7.8% in the 21^st Century. It is assessed that evaluated disasters are in 17 years but actually happened(light, medium, large and catastrophe)in 16 years, the accuracy is 94%, in which the evaluation accuracy of medium and large disasters 100%, evaluation effect is ideal, it has certain guiding significance for agricultural disaster prevention and mitigation.

Key words: Tianshui Prefecture of Gansu Province, climate resources change, apricot production, impact assessment