1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. Key- Laboratory for Oil Shale and Coexisting Minerals��Jilin University��Changchun 130061��China

Based on the grading low temperature carbonization of oil shale from typical basins in Northeast China��the authors aim to obtain the best interval of expelling hydrocarbon and the best heating way�� According to changes of low temperature carbonization products (shale oil��semi- coke��water��gas loss)��the results show that oil yielding of oil shale with low quality increases slowly��hence we adopt traditional heating way�� Oil yielding of oil shale with medium or high quality has no obvious change during ��-�� stages��while it has significant increases during ��- �� stages and almost keeps unchanged during �� stage��thus��the heating way of �� stage can be adopted��which will obtain high content of shale oil and can improve the semi- coke utilization value��