Abstract: In this article,the combinative method of qualitative and quantitative analyses is adopted to study the synsedimentary structure framework and its controls on the thickness of extra-thick coal bed & oil shale.It demonstrated that the synsedimentary structure framework of Fushun fault basin is a network.This network consists of two groups of different strike synsedimentary normal faults,known as NEE and NNW.It divides the basin into a series of sub-subsidence & sub-upheaval.By the co-operation of ancient climate,clastic sediment rate and some other factors,the synsedimentary structure framework of this Basin strictly controls the accumulative thickness distribution of coal bed & oil shale both directly and indirectly,through controlling the sediment environment and sediment space.Therefore,the whole body of extra thick coal bed & oil shale is distributed as a band through the east-west direction,thickening obviously in the sub-subsidence and then obviously thinking in the sub-upheaval.