The traditional research and design method in the metal structure of ship lock engineering has the disadvantages of long period and difficult quality control，which restricts the development of the industry level to a certain extent. BIM technology，parametric technology，and database technology are integrated to realize the design in the metal structure module of ship lock engineering. As the core function of module design，parametric drive design，and 3D-2D correlation design function are the innovation of metal structure design technology of ship lock engineering，which improves the technical system of ship lock metal structure design，and greatly improves the quality of design results and work efficiency. The database of ship lock metal structure design based on knowledge engineering and the expert system runs through the whole life cycle of ship lock engineering metal structure. It has the characteristics of resource sharing and strong inheritance，which plays an important role and significance in promoting knowledge flow and technology innovation platforms.