Abstract: In view of the low anchor efficiency,poor durability and poor corrosion resistance of anti-floating anchor,a new type of prestressed foundation anti-floating anchor with spiral stirrups is presented in this paper.Through in situ test and numerical simulation analysis,compared with the traditional non prestressed full length bonding anti-floating anchor,the stress characteristics,bearing capacity and engineering application of bearing type prestressed anti-floating anchor are studied.The results show that,though spiral stirrups arranged in the slurry body,improve the crack resistance and compressive properties of slurry,avoid the corrosion of reinforcement caused by cracking slurry,improve the bearing capacity,reliability and durability of bolt,thus ensuring the safety of anti-floating engineering.Its social and economic benefits are enormous,so it has broad application prospects in foundation anti-floating engineering.