Abstract: Buried hill of Langgu Depression has a unique geological structural background. Three apparent structural belts are distributed in space-Daxing fault buried hill structural belt, Hexiwu fault buried hill structural belt and Fengheying-Houshangcun structural belt. The static elements of oil and gas accumulations in those deep buried hill are quite different in space allocation. Top reservoirs of Daxing fault buried hill structural belt are likely to be dolomite of Wumishan Formation of the Middle Proterozic Jixian System. Source rock and its cap formation are high-quality Es3-Es4 mudstone. The cross section and unconformity surface are their important carrier systems. The tops of Hexiwu fault buried hill structural belt and Fengheying-Houshangcun structural belt are Carboniferous- Permian sandstone reservoirs or Ordovician limestone reservoirs, with development of inner curtain carbonate rock reservoirs. Source rock of the former is mainly Ek formation with some Carboniferous-Permian and Es3 and Es4 source rock. The unconformity surface and cross section are the main oil and gas transportation channels. Source rock of the latter is quality Es3 and Es4 source rock. Tongbozhen cross section is the main vertical and lateral oil and gas transportation channels. Unconformity surface in the buried hill is of vital importance to oil and gas accumulation in the buried hill. The results of accumulation model indicate that the exploration prospect of those buried hill structural belts are quite different one another. Daxing buried hill structural belt is the top exploration target