From the aspects of dredging volumes and soil property,spoil disposal area and sailing distance,dredging equipment,environmental strategy,dredging schedule and cost estimates,the dredging strategy and methodology for long artificial channel are analyzed based on 250 000 DWT channel design in Morebaya river of Guinea Simandou.Dredger production rate calculation method and the related key factors,dredger time and cost estimates are analyzed emphatically.The cost involves fuel cost,crew cost,depreciation cost,maintenance repair cost,general and administration cost,contingency cost,contractor’s margin and mobilization cost