Based on the technical accumulation and experience from practice of over ten team projects, the study mainly undertook a case study on the core innovation project in Hengqin Science City, for summarizing and synthesizing the key technical issues of BIM forward design for building professionals. The study aimed to make breakthroughs and innovations for the common difficulties and bottlenecks faced in the current forward design process and provide reference for the in-depth realization and application of BIM technology in complex public buildings.