Since there is no explanation on the calculation of the wave’s uplifting force on the caisson floor in the case that the caisson has a buried depth in the Code of Hydrology for Harbour and Waterway(JTS 145—2015),this paper carries out a comparative analysis of the influence of the caisson’s buried depth on the wave’s uplifting force between the code calculation and physical model test based on the practical projects. The result shows that the buried depth has reduction function to the wave uplifting force,and the the reduction degree shall be determined in combination with the buried depth,soil quality,caisson size,wave parameters,etc.