Shale oil resource potential analysis is one of the most important basic works in shale oil exploration practice. Recoverable oil resource is the most direct index of resource potential evaluation. Based on the existing research results of shale oil resources evaluation and the recovery of shale oil，the total resources and recoverable resources of the shale oil in Lower Es3 Member in Dongying Sag were calculated by the chloroform asphalt“A”method and the pyrolysis parameter method respectively. The calculation results show that the calculation results obtained by the two methods are basically consistent，which are 1 139 million tons and 1 157 million tons respectively. The shale oil resources are mainly distributed horizontally in the central zone of the subsags，which the abundance of the resources is between1 million and 2.5 million t/km2.Vertically，the shale oil resources are mainly occurred at the depth from 3 000 m to 3 500 m with 701 million tons shale oil resources，followed occurred at the depth from 3 500 to 4 000 m，which is 437 million tons shale oil resources. However，the amount of recoverable resources of shale oil are roughly equivalent at those two deep segments，which is 75 million tons and 73 million tons respectively. Shale oil located deeply has a higher recoverable rate. Lijin Subsag has high shale oil resource abundance and recovery mobility，high shale oil resource potential，and is a favorable area for shale oil exploration.