Abstract: In order to strengthen the reinforcement of retaining piles, the reasons of invasion and the treatment measures of retaining piles are analyzed and summarized by theoretical analysis method, and the force transfer method and the addition soil nail are introduced. The results show that the main reasons of invasion of retaining pile in foundation pit are divided into human factors and stratum factors. Through the combination method of force transmission and addition soil-nailing, the chiseled pile and adjacent pile can bear the overall force on the free surface in foundation pit, in a certain extent, the soil nails and mesh shotcrete panel of foundation pit could limit the unloading deformation of the side wall caused by excavation. The force transmission method and the addition soil-nailing method are proved feasibility, which can provide experience reference for similar projects.