Connecting structure of three-layer steel-plastic glass fiber composite pipe and connecting method thereof

The invention discloses a connecting structure of a three-layer steel-plastic glass fiber composite pipe and a connecting method thereof. The connecting structure comprises a connecting locking tile and a positioning glass-fiber bushing, wherein steel-pipe ends every two of which are connected with each other are respectively a steel-pipe convex ring, the connecting locking tile is locked onto the two steel-pipe convex rings, and the positioning glass-fiber bushing is wrapped at the outer side of the steel-pipe convex ring. Due to the adoption of the connecting structure, the three-layer steel-plastic glass-fiber composite pipes can be easily and simply butt joined, so that the problems such as corrosion, abrasion, scaling, rapid construction, rapid emergency repair, breakage prevention by external forces and the like of a high-pressure pipeline can be thoroughly solved, a running period of the pipeline is possible to improve to 50 to 100 years, the pipeline is basically free from the later-period maintenance