In the process of hydraulic filling，the dredged slurry should be filled in layers. The thickness of the layers is important to the consolidation of the dredged slurry. We use the settling columns with different height to carry out the settling experiments to the slurry with the same water content，and study the influence of dredged slurry height on the sedimentation law. The results show that with the same initial water content，the settling mode in a column with a lower slurry height tends to be consolidation settling，and the higher slurry height tends to be hindered settling. The initial height of the slurry has little influence on the settling rate when hindered settling occurs. The duration of the settling stage is proportional to the initial slurry height. The higher the slurry height is，the smaller the average water content of sediment is，and with the increase of slurry height，the average water content of sediment tends to be stable. When the slurry height is more than 40 cm in the scope of this study，the sedimentation rate and water content of sediment tend to be stable，and the settlement mode does not change any more. The slurry height has little effect on the sedimentation law.