When constructing interpenetrated densely packed pile foundations at sea，problems are prone to occur such as collision of piles below the mud surface，and obstacles to pile sinking by pile driving vessels caused by already constructed piles.By using BIM technology modeling，pile diameter expansion simulation，and dynamic adjustment of pile driving parameters，the maximum allowable error of pile driving collision and deviation is analyzed，and the early-warning and prevention of pile driving collision are achieved.By using BIM 3D printing technology to make scaled models of seabed，piles，and pile driving vessels，bringing in combinations of water level simulation and positioning devices，dynamically and accurately simulating offshore pile sinking，verifying the rationality of piles position layout and determining feasible pile sinking construction sequences.