Abstract: Daqingzijing is a big oil bearing area with over 100 million tons of oil discovered in recent years in the south of the Songliao Basin.Based on analysis of structural,sedimentary,reservoir and oil-forming characteristics,it has been concluded that the distribution of efficient source rocks and sandbodies had controlled the distribution of oil and gas.Oil and gas were mainly inhabited in the distributary channel and mouth bar of deltaic front.Reservoir properties,faults and low-amplitude structures controlled the accumulation of oil and gas.The combination of Baokang deltaic front sandbody and Daqingzijing syncline resulted in different types of oil pools and a wide development of lithologic oil reservoirs.