The invention discloses a high-temperature-resistant drag-reducing energy-saving heavy-duty anti-corrosion coating for thermal pipeline inner walls. The coating contains two components of A and B, wherein the weigth percentages of the component A comprise: phenolic epoxy resin 20%-30%, organosilicone epoxy hybrid resin 20%-30%, silicone-free polymer defoamer 0.3%-0.5%, pigment-affine-group-containing polymer interpolymer dispersant 0.5%-0.7%, hydrophobic fumed silica 0.35%-0.5%, castor oil modified derivative rheological additive 0.35%-0.8%, modified zinc phosphate 3.0% to 5.0%, aluminum tripolyphosphate 2.0%-4.0%, mica powder 10.0%-20.0%, talcum powder 10.0%-15.0%, titanium dioxide 5.0%-10.0%, polytetrafluoroethylene powder 2.0%-5.0%, xylene 2.0%-7.0%, and n-butanol 1.0%-3.0%; and the weight percentages of the component B comprise: modified alicyclic amine 72.5%-75.5%, and aminoalkoxysilane 24.5%-27.5%. The coating can effectively protect thermal pipelines, and reduce maintenance andpipe cleaning frequency, and has a positive effect on urban central heating.