Based on the observation data of 47 meteorological stations in the North and South Qinling Mountains from 1960 to 2016, the spatiotemporal variations of agricultural climate resources such as light, heat and water in the north and south of Qinling were analyzed by methods of climate propensity index, MannKendall trend test, correlation analysis and inverse distance weighted interpolation. The results show that since 1960, the temperature and the active accumulated temperature of ≥10 ℃ in the northern and southern areas of Qinling have a significant increase trend. After 1995, the temperature has risen rapidly and reached a significant level in 2002. The temperature increased obviously in spring, winter and autumn, and the tendency of increasing temperature in the north of Qinling Mountain was more than the south of Qinling Mountain in space. From 1960 to 2016, precipitation in the north and south Qinling Mountains showed a slight downward trend overall. In terms of time, the precipitation was mainly reduced before 1995, after that, the precipitation gradually increased. In the perspective of space, from 1960 to 2016, the precipitation showed a relatively obvious decline in the regions including the north areas of Qinling mountains, along the Jialing River and the Danjiangkou reservoir area of the Hanjing River drainage area. Some areas show a slight upward trend, mainly in the Bawu Valley, the Daba mountain section of the Hanshui valley and the eastern part of the southern slope of the Qinling Mountains. In the recent 57 years, the relative humidity in the north and south Qinling Mountains showed a slight downward trend, and the degree of decline in recent years has increased. There is a significant decline for the sunshine duration. The sorting order to reduce of the sunshine hours of four seasons is summer,winter,autumn and spring. Significantly decreased areas are mainly distributed in the eastern plain of the study area, Hanzhong Basin, Guanzhong Basin and Bawu Valley.

Key words：agricultural climate resources; temporal and spatial changes; the northern and southern regions of Qinling Mountains