Kuruketage region belongs to Kuruketage stratigraphic subregion of Tarim stratigraphic region in northwest stratigraphic region classification. Its sedimentary feature was influenced by Tarim Basin, but it’s not the same as Tarim Basin’s. This area was rarely studied before. According to field outcrop data, there are obviously different between the sedimentary feature of Ordovician of north and south area of Kuruketage region. In the north area, it’s mainly of carbonate rock formation in lithology and of shallow-sea facies fossil such as Trilobita Cepohacopoda, Brachiopoda and Anthozoa in fossil feature. While in south area, it’s mainly of flysch formation in lithology and of deep-sea facies fossil such as Graptolithina in fossil feature. So it is obviously that the north area of Kuruketage region was higher than that of the south area in Ordovician period which was reflected by sedimentary feature such as lithology, ancient fossil, sedimentary structure and sedimentary sequence. In the study area, tableland sea , wide continental shelf , shelf margin slop , deep sea basin and shallow sea sedimentary facies are developed. Four sedimentary facies patterns can be deduced from sedimentary facies and its extending feature. They are tableland sea—wide continental shelf sedimentary facies pattern, basin margin slope—deep sea basin sedimentary facies pattern, sea-land transitional facies—shallow sea sedimentary facies pattern and alluvial fan—delta sedimentary facies pattern. A theory foundation is laid for further studying and oil exploration.