Based on the field data,the characteristics of hydrodynamic and sediment along the 100,000 DWT deep water channel of Panjin Port are analyzed,and the sediment source of channel siltation and the possibility of sudden siltation are also discussed.The main research conclusions are shown as follows：1） The wave in this area is not strong,mainly wind wave;the tide is irregular semi-diurnal tide,which belongs to the middle strong tide area.The current is regular semi-diurnal tidal current,which mainly moves in the form of rectilinear current,and there is weak rotary current in the inner side of the entrance.2)The sediment concentration in estuarine area and near shore shoal is high,while that in open sea deep water area is low.The sediment mainly moves in the form of suspension.The sediment concentration in windy days is significantly higher than that in normal days.3)The distributions of sediment grain sizes along the channel are coarse and fine alternately;under the action of wave and current，the sediment incipience and transport in shoals on both sides of the channel are the main source and direct source of channel siltation;the siltation sediment in channel is relatively fine,which means that the siltation is mainly suspended sediment deposition;the possibility of sudden siltation is relatively small.