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The Late Paleozoic marine strata in northeastern China are distributed in zonal pattern and surrounding the Jiamusi--Mongolia block�� The unsteady sedimentation such as well-developed lithic feldspar sandstone�� transverse lithological variation��unstable lithofacies and development of volcanic rocks��indicated these strata belonging to active sediment�� From the core to the marginal suture belt of the Jiamusi --Mongolia block��obvious lithofacies change of old land --para --epicontinental sea --continental shelf sea --abyssal sea can be seen�� The authors suggested that the Late Paleozoic marine strata might belong to continental marginal deposits of Jiamusi --Mongolia block in northeastern China��based on the zonal distributions��active deposition��and regular distribution of the tectonic lithological zones��