Dredging in shallow area has always been a knot in the maintenance dredging of inland river waterways.It is impossible for a trailing suction hopper dredge to sail to the dredge cut and execute dredging operation when the channel depth of inland rivers can’t meet the requirements of unloaded draft of a self-propelled trailing suction hopper dredger.A newly developed high-pressure water jet and suction system installed in the stem of trailer has successfully solved this problem and achieved good economic and social benefits.