Abstract: To make an over-all supervision in Complicated Terrain Area by phenological index and make precision agricultural climatic regionalization is a simple and accurate method. We made the phenological supervision in Jiexiu City, Shanxi Province by different landform、height above sea level and microclimatic zoning at a fixed point. We knew the climate difference and some microclimatic characteristics in Jiexiu by long-term observation abut 133 items phonological phenomenon. This will provide a scientific basis for establishing precision agricultural climatic regionalization and developing ecological agriculture. If we can make good use of phenological index and get climate data of one place, we will take full advantage of local zoology for agriculture increase yield and income.