The traditional two-dimensional drawings in the water transport engineering design can not realize direct statistics of the engineering quantity and guidance of the construction,but by adopting the BIM technology,we can realize the collaborative sharing,collision check and engineering quantity statistics,and the information integration with the BIM model can be applied to all stages of cost management.Using the BIM technology and modeling in the second-line ship lock in the Dayuandu navigation and hydropower project in the second phase of the Xiangjiang River second-class channel,and reviewing the engineering quantity by the BIM technology,the cost engineers can get rid of the tedious work of the calculation.It has great social value for the comprehensive management of cost of water transport engineering projects.