Longdong Lingtai County is located in the southern margin of the Loess Plateau, northwest of the high-lying, south-eastern low altitude in between 890 ~ 1520 meters, is located in east longitude 107 ° 00'-107 ° 57 ', latitude 34 ° 54'-35 ° 14' . The annual average temperature 8.6 ℃, the highest temperature of 35.8 ℃, minimum temperature of -23.2 ℃. The annual average precipitation 654.4mm, uneven rainfall distribution, rainfall accounted for 7,8,9 months of 55.5% of precipitation throughout the year. The total annual average sunshine hours of 2453 hours, greater than or equal to 10 ℃ accumulated temperature of 2804 ℃, the annual frost-free period 159 days. The territory of a plateau (even the word Plateau) mountain (southern mountain) Kawasaki 2 (up to River, Black River District), the entire territory of 78 kilometers from east to west, north and south 40 kilometers wide, with a total area of 2038 square km, is a Loess Plateau. South-east and Shaanxi Changwu, Binxian,you , 1000 Yang, Longxian border, north-west and the province Chongxin, adjacent Jingchuan County.