In order to fill the blank of technical support of BIM application in dredge engineering,the application demand analysis and standardization design process of this specialty are carried out.AutoCAD Civil3D 2017 is utilized as BIM software and secondary development is carried out on Autodesk platform using .Net programming language.The developed custom assemblies can help building information model for dredge engineering and significantly simplify repetitive work.Several results,like 3D model,multiple section views,construction drawings and 2D&3D quantities can be produced out of the BIM model automatically.It has been tested and proved in some practical engineering,which means BIM forward designing is successfully applied in dredge engineering.