Abstract: In order to achieve the coordinated goal of high-quality development of mining industry and ecological environment protection，aiming at the systematic problems faced by large open-pit phos⁃ phate mines in green transformation，a systematic case study is carried out in Haikou Phosphate Mine of a national green mine，Yunnan Phosphate Haikou Co.，Ltd.，through the analysis of the mine’s 2024 annual self-assessment report and long-term practical experience，from the six dimensions of mining area environ⁃ ment，resource development，comprehensive utilization，energy conservation and emission reduction，sci⁃ entific and technological innovation，and enterprise-land harmony，this paper summarizes the specific practices and key data of“mining while controlling”ecological restoration，efficient utilization of medium and low-grade resources，and intelligent management of the whole process.The results show that the mine has successfully constructed a planning-technology-collaborative sustainable development model charac⁃ terized by high-standard planning as the guide，scientific and technological innovationas the core drive， and resource-environment-community collaborative development.In 2024，the total self-assessment score of green mine construction in Haikou Phosphate Mine is 937 points，the scoring rate of resource develop⁃ ment mode is as high as 97.9%，and the full score of energy saving and emission reduction is obtained. It provides a systematic solution and implementation path for the green，low-carbon and intelligent transfor⁃ mation of similar large open-pit mines，especially the phosphate industry.

Key words: Haikou Phosphate Mine, green mine, ecological restoration, energy conservation and emission reduction