Continental basins of the Late Cretaceous in southeast China are characterized by red coarse terrestrial clastic rocks. Fabric analysis of gravels was carried out at 19 outcrops of the Upper Cretaceous Hekou Formation of Fuzhou-Chongren basin in western Gan-Hang tectonic belt, and the composition, particle size, shape and preferred orientations of gravels were also studied in detail. Combined with lithologic features of bedrocks, the source, genesis and formation conditions of gravels at different areas are analyzed and discussed. The result shows that the gravels of the Late Cretaceous Hekou Formation were the products of alluvial fan and braided river facies in a semiarid to arid climate condition with multi-source and rapid accumulation.