With in-depth application in the field of construction BIM technology in recent years, cases have also made a lot of work and experience, compared with construction, municipal engineering project for the application of BIM technology is relatively lagging behind, especially roads, Bridges, municipal infrastructure such as pipelines and tunnel, complicated construction conditions, the means of design, construction management is still old, investment control is weak, needs through effective technology management, improve the whole quality engineering technology in municipal engineering industry has increasingly in - depth application and promotion. With new Yang Gaona road tunnel project as an example, this paper focuses on the BIM technology application in urban tunnel project.