There are many factors which decrease the throughput of the ship loading system in large coal terminal,especially in the case of continuous layout berths.The influence factors such as deballasting delays,system capacity and changing hatches,etc.are analyzed deeply and the relevant solutions are proposed.Then the reasonable matching of waiting and working berths is recommended in continuous layout berths of coal ship-loading terminal.Combined with the Huang-Hua port project and the research result,optimal layout plan of terminal has been put forward.