Abstract
Based on the abundant data and information of the Loess Plateau, China, the spatial and temporal changes of climatic factors and their impact on agricultural production have been studied. It is found that different areas had different restrictive factors to agriculture, and different factors had different changes. So agricultural production should be arranged according to local climatic conditions. For example, the crop planting should be arranged in the south-east plateau where precipitation is more than 400mm and aridity is lower than 2.0, while the land where no water for irrigation and precipitation $300mm can only be used for developing the extensive animal husbandry.
