Abstract: With the development of China 's construction industry and the promotion of information urbanization, there is a serious problem of poor connection between extensive management and design and construction execution in the construction industry. Such problems directly lead to the project into the dilemma of out-of-control construction period, high cost and prominent quality hidden dangers. Such problems are particularly obvious in projects with high functional integration and precise construction technology. As an effective way to solve the problem of this industry, the application value of BIM integration mode of design and construction has attracted more and more attention. This paper takes a certain task hall as the research carrier, focusing on the optimal technical solutions adopted to accurately meet the functional requirements of the building under the integrated BIM mode for design and construction. In view of the core requirements of the project, the key work of BIM optimization design of pipeline arrangement, investigation and treatment of pipeline collision points, integration design of shielding shell and electromechanical interface, and deepening design of ceiling decoration are systematically carried out. Through theoretical analysis and practical verification, specific and feasible implementation paths for optimizing architectural design are summarized. Practice results show that this mode can significantly improve the communication efficiency among all participating parties, effectively reduce the total construction cost, and greatly shorten the total construction period. The comprehensive benefit is far more than the traditional construction method, and the proposed method has strong promotion value and industry reference significance.