With the constant acceleration of the national urbanization process, the construction of underground structure is in a blowout development. According to the metro design specification, the connection channel needs to be set up for the upper and lower line of the interval tunnel. The traditional mining method combined with freezing and grouting reinforcement has disadvantages such as long construction period and great impact on the surrounding environment. Therefore, the application of BIM technology in the connection channel of innovative engineering method and mechanical method is carried out. The parametric model is adopted for the engineering structure design simulation and optimization design of intensive construction equipment, with the BIM model seen as a carrier of information. Based on site construction and scientific research, the model is modified by feedback and further design. Data in BIM model is extracted and, combining with other techniques, applied in the management on scheme, construction site, schedule and cost. In this way, the construction of the first mechanical communication channel in China is completed safely and efficiently, with improving management level on comprehensive projects, shortened construction period and good construction quality of the project. Meanwhile, it provides theoretical basis and technical support for the construction of the mechanical communication channel, and also points out the direction for the development of the construction technology of the communication channel.