Braided channels commonly exist in the alluvial river. The most obvious difference between braided channel and single channel is in water flow and sediment transport. For the braided channel, flow and sediment in the diverge area and conflux area are more complex compared with the single channel , and it is easy for sediment silting, which results in water depth deficiency and navigation obstruction because of the broadening entrance. The braided channel has several sub-types, including duplex braided channel, on which little research has been carried out. The regulation technique for the duplex is also immature. Taking the Anqing duplex-braided river section as the study case, this paper probes into the regulation effect of different parts with river model test and measurement method combining with the data analysis, and proposes the key parts to be regulated based on a comprehensive comparison of Anqing duplex braided reach and the key parts.