Based on the systematic analysis of the relation between physical parameters of reactor and engineering structure, the reactor structure template is constructed. Combined with physical and structural analysis method, with the application of parametric modeling, computer simulation, virtual reality technology, scientific visualization and database technology, a design platform of a large-scale integrated synthetical reactor are aimed to be developed. With this platform, automatic 3D modeling based on physical parameters can be realized. And other important functions, such as particle transport analysis and engineering thermodynamics analysis, can also be achieved. Thus, seamless integration (data integration, control integration, interface integration) can be fully realized. This super-large synthetical design platform provides reactor designers with an integrated visualized design environment.