Abstract: Kendong high arch is only covered by the Upper Tertiary. There are no oil source beds. Its oil/gas comes from four surrounding sags and the distance is far about 5~45km. Based on the analysis to oil/gas formation conditions of dynamics system of Kendong high arch, five oil/gas formation dynamics order systems in vertical are divided and four oil/gas formation dynamics sub-systems in lateral are recognized. The dynamics evolution process and oil/gas formation model are discussed. Finely the paper point out that most good oil/gas formation dynamics sub-systems is Zhuangdong-Kendong oil/gas formation dynamics sub-systems, which has high power, developed migration system, good traps and longer oil/gas formation time (10Ma).