Fixing device for repairing lining composite pipe

The utility model provides a fixing device for repairing a lining composite pipe, which relates to the technical field of composite pipe fixing devices and comprises a concave supporting seat, a lining composite pipe is fixed at the top end of the middle of the concave supporting seat and comprises an end connecting pipe, and a tail connecting pipe is fixed on the side face of the end connecting pipe. A fixing device is arranged at the top of the concave supporting seat and comprises a convex lock hoop, threaded holes are formed in the two end faces of the convex lock hoop, fastening anchor bolts are in threaded connection with the inner walls of the threaded holes, an upper rubber clamping plate and a lower rubber clamping plate are fixed to the top of the concave supporting seat, and a lining composite pipe is clamped and fixed between the upper rubber clamping plate and the lower rubber clamping plate. An arc-shaped supporting plate is fixed to the top of the lining composite pipe, a maintainer presses the