0ne effective way to solve the problem of short transmission distance caused by insufficient head of the unloading pump is to set up a pressurization system in wharf.In view of the design problem of the pressurization system on the wharf with long approach bridge,this paper conducts research on process transmission scheme,selection of booster pumps and control technology.The research methods such as the coupling pipeline characteristic curves and pump set flow-head curve are adopted.The conclusion is that when a booster pump is installed on the wharf platform,there is a lack of effective buffering between the ship pump and the booster pump,the upstream and downstream pump flow rates are difficult to match,which can easily cause the booster pump to be emptied.It should not be used as the first choice when conditions permit.The flow rate and head of the booster pump should be determined according to the maximum unloading flow and the maximum viscosity,and the design margin should not be taken,otherwise it will seriously deviate from the rated working point of the pump and affect the normal operation of the pump.Drawing the pipeline characteristic curves and the coupling diagram of pump combined operation flow-head curve for different unloading flow and viscosity medium,it can effectively solve the problem that the optimal operation of pump combination and control scheme are difficult to determine.