Abstract：
Spatial grid structure and grid enclosure structure are esthetic, reliable, safe and economic, so they have been well accepted. With comprehensive application and fast development, accident of grid structure often happens. After analysis on reasons causing accidents of grid structure, different measures, such as overall reconstruction, local reinforcement, reinforcement by node and reinforcement by support, etc., are usually adopted respectively according to different damage degrees. A kind of displacing device for reinforcement of grid structure rod is successfully designed with references to existing documents and sufficient studies have been carried out on such device.
