National key cultural relics protection units of Dadiwan ruins located, Tianshui City, Gansu Province, Qinan County, northeast of Wuying Xiang Shao Dian Cun, distributed in the Hulu River, a tributary of the Qingshui River on the South Bank of the second and third level terrace phase corrosion on the hillside, 102 kilometers away from Tianshui city. Neolithic early and Yangshao culture of the early, middle and late stages of cultural sites, site area of about 2.75 million square meters, cultural thickness of 1-4 meters ago 49 - 81.2 years is in Northwest China archaeological discoveries in the early Neolithic culture, 1988 was announced as the national key cultural relics protection units. Dadiwan culture type, continued for a long time, early history, high skill level, distribution area is wide, the appearance preservation is good have attracted much attention in the field of archaeology.According to the textual research and Dadiwan ruins can be roughly divided into five culture: pre Yangshao culture Yangshao culture early, advanced and lower Changshan culture, the historical age dating from 8000 years ago continues to 5000 years ago. About 8000 years ago, one of the first period is about years. It is the earliest Neolithic culture in the archaeological discovery in the northwest of China.Archaeologists in Dadiwan ruins clear hair disinter house sites 240, kitchen access 98, pits and cellars 325, 71 tombs, 12 paragraph kiln 35 seat and ditches, the cumulative unearthed pottery 4147, stone (including jade) 1931, cornu teeth clam 2218 and animal bones more than 17000 pieces, clean up the house sites 240, 104 tumor site, pits and cellars 342, kiln 38, 79 tombs, trenches 9.Lower Changshan culture Yangshao culture to the remains of the Qijia culture transition properties. The discovery provides important enlightenment and fresh data to investigate the Yangshao culture of the Weihe River basin development direction and Qijia culture of origin. Dadiwan site for the establishment of the sequence of the prehistoric culture in the upper reaches of the Weihe River, of the Neolithic culture in the Yellow River Valley of generation, development and exploration of the historical process of the origin of Chinese civilization has very important significance.