Usually the bed leveling period after massive dredging period is unavoidable during a dredging project for TSHD, and the efficiency of bed leveling will be quite low, especially for stick clay. Because of the property of stick clay, the difference of the bed will be increased if the shallow points were not eliminated in time,the bed leveling will become even harder for TSHD. In order to solve the problem, we carry out a study, with the help of accurate dredging techniques provided by new supervision technology, the bed leveling period is eliminated, and the dredging efficiency of TSHD is increased.