Combined with the CCMP wind field and Holland gradient wind field,based on SWAN,numerical simulation was made for the East China Sea wave field during the period of typhoon Muifa to provide optimum spectrum boundary of the small scale.The satellite data were used to verify the simulation results,and the optimal maximum value of drag coefficient was discussed.The nested small scale numerical simulation in SWAN was conducted to study and analyze two kinds of reserving channel schemes after regional ocean utilization,which combined with the measured date of wave station.The results demonstrate that the significant wave height in west passageway is smaller compared to reserving east passageway,and the average decrease is 0.10 m and the maximum damping is 0.25 m from the feature points during typhoon period.