Abstract: The lower reach of the Yellow River is famous for its frequent diversions. The Qingshuigou channel of the Yellow River has undergone a complex evolution process since its opening. The long-time-series remote sensing has the advantages of good continuity and strong timeliness and thus can realize the dynamical monitoring of river channel changes. By taking 40 Landsat remote sensing images obtained from 1976 to 2019 as the data sources and using the algorithm which is the combination of Modified Normalized Difference Water Index and maximum between-class variance method for extracting the information about the Qingshuigou channel, a monitoring research on the change law of the Qingshuigou channel since 1976 is carried out. The results show that with the deepening of the degree of human intervention, the changes of the Qingshuigou channel of the Yellow River are characterized with a natural swing dominated by human control and the frequency and amplitude of the channel avulsion and swing are less than before, expecting that the number of years of river travel could be increased. This study can provide important scientific basis for the regional governance of the Yellow River Delta.