Abstract: Screw piles have some advantages of convenient construction,fast progress,less adverse impact on environment,etc,and has been widely used in foundation of the ground photo-voltaic power stations.However,it is apt to damage in corrosive soils and shorten its service life,especially in saline soils.By summarizing the corrosion mechanism and influence factors,combining with a case of corrosion on screw piles for a photo-voltaic power station in the northwestern saline soils,on the basis of investigation,numerical simulation and cause analysis,different treatment measures are proposed according to the different degree of corrosion damage. The corresponding measures are put forward according to the aspects of the materials,protective layers,improving the mechanical properties improvements and applied current protection,etc.From the analysis and treatment process of corrosion,it could provide references and lessons for the design,identification and disposes for similar engineering.