Abstract: Taking a large-scale granite open-pit mine for construction as the research object，two de⁃ velopment and transportation schemes of highway + adit chute（scheme I）and highway + fixed crushing sta⁃ tion（scheme II）are proposed，and the cost comparison analysis is carried out. The results show that the av⁃ erage annual operating cost of scheme I is 8 million yuan lower than that of scheme II，but because of its long construction period（3.5 a）and high investment（90 million yuan higher than that of scheme II ），the payback period of the difference investment is 11 a，and the comprehensive economic benefit is insufficient. The investment of scheme II is low，and the capital construction period is only 1.5 a. It can be put into pro⁃ duction quickly and is recommended for comprehensive application. In terms of transportation equipment se⁃ lection，it is found that the initial investment of new energy wide-body vehicles is 3.86 times that of fuel ve⁃ hicles by using the present value-cost method，but the average annual operating cost is reduced by 50%， and the present value of the whole cycle cost is reduced by 20.5%，which is more economical. The conclu⁃ sion shows that the scheme of highway + fixed crushing station combined with new energy equipment meets the needs of green transformation while ensuring economic benefits，and provides a practical example for the optimization of open-pit mine transportation system.

Key words: open-pit mine, highway transportation, new energy wide-body vehicles, present value?cost method