Current Code for Design of Hydraulic Structure of Shiplocks (JTJ 307—2001) provides no definite regulations considering the floor’s deadweight in the internal force calculation, and various reductions have been made by different designers according to the detailed foundation conditions. Based on construction experiences and calculation analysis, Design Specification for Sluice (SL 265—2001), which indicates the floor’s deadweight is not to be considered and the reduction degree is 100%, is suggested to be utilized as the design guide and reference. And it is recommended that similar clauses and directions should be supplemented in the Code for Design of Hydraulic Structure of Shiplocks (JTJ 307—2001).