Project cost management is an important part of construction projects, which is directly related to the project profit and the financial condition of construction companies. As the project budget cost analysis is complicated and the actual schedule cost cannot be accurately collected in time, the project cost is hard to control. In this paper, through analysis of metallurgical project characteristics, we combine BIM technology with the metallurgical project cost management work. In this model, it realizes a fine management of the project cost and improves the profitability of the project, which provides a new idea or method for the cost management in metallurgical construction.