The application discloses a heat-preservation pipeline fixing support without damaging a heat-preservation structure, which comprises a
fixed wing ring fixed on the periphery of a working steel
pipe, a skirt is arranged on the two sides of the
fixed wing ring, an installation gap is formed between the skirt and the working steel
pipe, an outer protective
pipe is arranged in the installation gap, a heat
insulation layer is arranged between the outer wall of the outer protective pipe and the inner wall of the skirt, and a heat preservation layer is arranged between the inner wall of the outer protective pipe and the outer wall of the working steel pipe; the end of the skirt away from the
fixed wing ring is wound with a sealing belt, and the sealing belt is used for connecting and sealing the skirt and the outer protective pipe; the heat-preservation pipeline fixing support is reliably connected with the working steel pipe through the fixed wing ring, the stability of the pipeline under the action of
thermal expansion and cold contraction and external force is ensured, the two outer protective pipes are connected to the two sides of the fixed wing ring respectively, the two-section outer protective pipe cooperates with the skirt and the heat
insulation layer to form a complete heat-preservation support structure on the two sides of the fixed wing ring, the heat-preservation performance of the pipeline is ensured, the pipeline
corrosion resistance is improved, and the service life of the pipeline is prolonged.