The ecological issues of abandoned open-pit mining sites are becoming increasingly prominent with the development of mineral resources,posing serious environmental challenges.This study explores effective pathways for ecological restoration with a copper open-pit mine site as the research background.Based on local conditions and geological characteristics,the site employed an integrated in-situ acid control-soilless mixed fiber-microbial restoration technology to fulfill the ecological restoration of abandoned sites.The approach includes top area reinforcement,water interception and drainage system construction,soil improvement,and vegetation restoration.The results demonstrate significant restoration outcomes,providing critical insights and references for similar restoration projects and advancing the development and application of ecological restoration technologies for abandoned mining sites.