The invention discloses a fluorocarbon powder coating for outdoor iron towers, and a preparation method thereof. The fluorocarbon powder coating is prepared from, by weight, 35-45 parts of polyvinylidene fluoride resin, 8-12 parts of polytetrafluoroethylene resin, 12-16 parts of super weather-proof polyester resin, 20-30 parts of cycloaliphatic epoxy resin, 12-18 parts of acrylic resin, 12-18 parts of epoxy modified alkyd resin, 2-5 parts of polyhexamethylene guanidine, 3-6 parts of modified graphene, 6-10 parts of nano-silica, 0.5-3 parts of nano-alumina, 4-10 parts of barium sulfate, 1.8-2.4parts of silane coupling agent KH-792, 0.2-0.4 part of calcium stearate, 0.3-0.5 part of benzoin, 0.5-1 part of a leveling agent and 4-8 parts of a TGIC curing agent. The fluorocarbon powder coatinghas the advantages of excellent mechanical properties and super strong weather resistance, super strong chemical resistance and super strong leveling property, and has the characteristics of crackingresistance, aging resistance and long service life when applied to outdoor iron towers, and the preparation method is simple, and can achieve industrial production.