China is a mountainous country with complex and diverse terrain and diverse geological conditions. Geological disasters occur frequently during the flood season each year， which is prone to induce landslides， collapses and mudslides， etc.， posing a great threat to national economic construction and personnel safety. Since the disaster occurs during the main flood season， the treatment of the slopes in such conditions is all emergency projects， and the construction period is tight. The small-diameter steel tube soldier piles， due to its characteristics of fast construction speed， small excavation amount and small disturbance to slopes， is applicable to emergency works with tight deadlines. Taking a specific project as an example， this paper analyzes the deformation mechanism of the slope retaining wall， and describes the the treatment plan with small-diameter steel tube soldier piles. The treatment increased anti-overturning ability of the retaining wall， and effectively solved the problems of insufficient bearing capacity of the retaining wall foundation and the secondary disasters such as slope collapse caused by large-scale excavation of foundation.， It can provide reference for similar projects.