In view of the limitations of two-dimensional design in dealing with spatial complex structural design and calculation problems，building information modeling (BIM technology)is used to carry out the structural design of the floating mooring column of ship lock in the visual environment.Based on the BIM model，the finite element simulation calculation and analysis are carried out to the design research on the floating mooring column structure of ship lock.Two kinds of BIM models including fixed and articulated of ship lock floating mooring column are built，and studied respectively from the aspects of structure and mechanical property analysis.The results show that the mooring trolley of floating mooring column of articulated ship lock can solve the problem of poor adaptability of mooring height well.The multi-layer mooring trolley is flexibly connected by connecting rod，which reduces the supporting reaction of buried parts and improves the structure safety and later maintenance greatly.The design is tested by several ship lock engineering applications，and it can provide references for the similar engineering design and improvement.