Device and method for repairing and strengthening pipelines with tensile reinforcing parts

The invention aims to provide a device and method for repairing and strengthening pipelines with tensile reinforcing parts. The device for repairing and strengthening the pipelines with the tensile reinforcing parts comprises a main body bracket, a pulley assembly, a reel assembly, a propulsion assembly, a drive assembly and a mounting arm; a central pipe is arranged on the main body bracket, reinforcing wires output from the reel assembly penetrate through the central pipe and the mounting arm in sequence under the action of the propulsion assembly; the pulley assembly comprises three adjusting rods slidably connected to the main body bracket in the radial direction of the central pipe; the ends of the three adjusting rods are rotatably connected with rollers, and the three rollers are connected to form a regular triangle with the central pipe as the center; and an adjusting assembly for controlling the three adjusting rods to slide synchronously outwards or inwards is further arranged on the main body brack