The open silty silt channel is silted all the year long.How to balance navigational safety and the economic feasibility of dredging projects while considering the influence of sedimentation characteristics has become a focal point of concern in the industry.Based on the analysis of measured data and numerical simulation,this paper establishes a mathematical sediment model considering the coupling of wave and current for an open silty silt channel,and compares the annual re-sedimentation rates of various maintenance dredging schemes to evaluate the sensitivity of these rates to different dredging indexes.The results show that the increase of dredging width of open silty silt channel can effectively reduce the annual re-sediment.The research results can provide reference for the optimization of the maintenance scheme of the open silty silt channel.