Abstract: Based on the climate datum from 1961 to 2000 in 6 counties which belong to Longdong loess plateau, the meteorological factors such as sunlight, temperature and precipitation have been analyzed. The result shows that the precipitation over the loess plateau decreased and temperature increased similar with the other areas in China and the whole globe and the climate turns to warm-dry. It also shows that the region is suitable for planting apple, apricot and jujube etc. less suitable for pear, peach. Because of the comment above, the planting area of suitable and unsuitable fruit tree should be adjusted. The phenomenon of diseases and insect pests of fruit tree turns to be serious because of warming winter should also be paid much more attention to.