Abstract: The Source Region of the Yellow River is widely developed with meandering rivers of different channel width scales, which are characterized by high sinuosity, complex morphology, and dynamic migration.The spatiotemporal variations in morphological characteristics and lateral migration rates of these meandering rivers, however, have not been adequately studied quantitatively.The morphological characteristic parameters (wavelength, amplitude, and curvature) and normalized curvature analysis of the continuous bends of the main stream and tributaries (Maiqu, Requ, Haqu, Gequ, and Denehequ rivers) in the Black River were obtained using a combination of UAV aerial survey images and high-resolution remote sensing images, through the Inflection Point Method (IPM) and Mean Centerline Method (MCM) of Meandering Morphometrics Module, and calculate the lateral migration rate of the Black River.The results show that the IPM and MCM can quickly identify and statistically analyze the morphological characteristics of meander rivers.The number of bends selected by the IPM is more than that of the MCM in the same river section.In comparison to the average migration rate (0.42 m/a) of the mainstream, the average migration rate of the selected river sections of Maiqu and Requ rivers was 0.52 m/a and 0.64 m/a, respectively.The neck cutoff accelerates the process of lateral migration and affects the magnitude of migration rate to varying degrees.The composition of peat-type riverbank materials is an important reason which affects the migration rates of meandering river in this region.