Abstract: According to the status of marine engineering's informatization in China, this paper puts forward application of BLM (Building Lifecycle Management) which can improve the core competitiveness of an enterprise by applying BIM (Building Information Modeling) in design, construction, operation maintenance phase of a project. In the light of the characteristics of marine oil and gas development and the problems of structural design phase, this paper puts forward a new automatic design approach that applying BIM technology to the structural design realize the Revit (Pre-treatment)-SACS(structural design and calculation)-Revit (after-treatment) process, which could bring huge economic benefits and set the tone for the implementation of BIM technology in the latter construction, operation maintenance phase.