In the construction of the second TBMdriven section of West Qinling tunnel, the straight distance from the portal of the inclined shaft to the muck yard is short, however, the mucking route is steep. If dump trucks are used to transport the mucks from the portal of the inclined shaft to the muck yard, there will be great difficulties and poor cost efficiency. Therefore, belt conveyor system is designed to deliver the mucks directly into the muck yard in the valley. In the paper, the layout, inclination, belt width, drive motor selection and support frame design of the belt conveyor system are discussed and the construction of the belt conveyor system is summarized. Good coordination has been achieved between the mountainclimbing belt conveyor system and the belt conveyor systems inside the main tunnel and the inclined shaft. In the end, the advantages of mucking by continuous belt conveyor system have been fully used and good tunneling and economic results have been achieved.