This paper studies the project cost management based on BIM technology. The application value of BIM technology in project cost management is mainly reflected in the following seven aspects: ① improving the accuracy of engineering quantity calculation; ② Better control of design changes; ③ Improve the accuracy and feasibility of project planning; ④ Accumulate * * * enjoyment cost data; ⑤ Improve the timeliness of project cost data; ⑥ Support cost control in different stages; ⑦ Support multi-calculation comparative analysis of different dimensions. Option D belongs to the value of BIM technology applied to construction schedule management.