This paper mainly introduces a kind of electrically insulated prestressed anchorage system used in post-tensioned prestressed Bridges. The main difference between this anchoring system and common anchorage system is that electrically insulated anchor plate is used. The plate consists of a circular pressure plate and a plastic horn, while the middle of the pressure plate is a traditional cast iron core surrounded by ultra-high strength concrete that is nearly insulated. By embedding the electrically insulated anchor plate and using plastic bellows, the prestressed tendons and anchors are isolated from the surrounding concrete insulation, which can not only protect the prestressed tendons well, but also measure the impedance between them at any time by using impedance meters. According to foreign research results, the impedance value reflects the degree of corrosion of prestressed tendons. In this way, the non-destructive testing system can be formed by monitoring the dynamic impedance value, and the safety and durability of prestressed concrete structures can be effectively improved.