NOVELTY - Weather-resistant fluorocarbon coating comprises: component-A including 40-65 pts. aliphatic isocyanate curing agent and 35-60 pts. anhydrous diluent-A; and component-B including 30-45 pts. fluorinated ethylene vinyl ether (FEVE) fluorocarbon resin, 0-15 pts. etherified melamine resin, 5-20 pts. terminal hydroxy group containing saturated polyester, 2-8 pts. reactive group containing low-molecular weight compound, 0.1-1.5 pts. metal compound catalyst, 20-25 pts. anhydrous diluent-B, 0-25 pts. inorganic filler, 0.2-2 pts. wetting dispersant and 0-0.5 pts. leveling agent.    USE - The fluorocarbon coating is useful for coating: the substrate to protect the substrate (claimed); and solar battery back-sheet to withstand harsh environment.    DETAILED DESCRIPTION - Weather-resistant fluorocarbon coating comprises: component-A including 40-65 pts. aliphatic isocyanate curing agent and 35-60 pts. anhydrous diluent-A; and component-B including 30-45 pts. fluorinated ethylene vinyl ether (FEVE) fluorocarbon resin, 0-15 pts. etherified melamine resin, 5-20 pts. terminal hydroxy group containing saturated polyester, 2-8 pts. reactive group containing low-molecular weight compound, 0.1-1.5 pts. metal compound catalyst, 20-25 pts. anhydrous diluent-B, 0-25 pts. inorganic filler, 0.2-2 pts. wetting dispersant and 0-0.5 pts. leveling agent. The reactive group containing low-molecular weight compound includes polyol, alicyclic alcohol, aromatic alcohol, alkanolamine and/or diamine. The metal compound catalyst includes zinc ethylhexanoate, stannous octoate, dioctyltin dilaurate, butyltin oxide, butyltin tris(2-ethylhexanoate) and/or dibutyltin dilaurate. The diluent-A or diluent-B includes 7-10C aromatic hydrocarbon, 3-8C ester compound, 1-5C alcohol compound and/or 2-6C ketone compound. The inorganic filler includes titania, carbon black, calcium carbonate and/or nano silica. The wetting dispersant includes acidic group-containing copolymer wetting dispersant, pigment affinity group-containing high molecular weight block copolymer type wetting dispersant, acrylic block copolymer wetting dispersant, highly branched structural polyester type wetting dispersant and/or hydroxy functional group-containing carboxylic acid ester wetting dispersant. The leveling agent includes polyether siloxane copolymer type leveling agent, reactive polyether modified fluorosilicone type leveling agent, polyether modified polysiloxane type leveling agent and/or polyacrylate leveling agent. The mass ratio of isocyanate group in component-A and hydroxy group of component-B is 0.6-1.5:1, preferably 1:1. The coating is prepared by mechanical mixing of component-A and component-B. An INDEPENDENT CLAIM is also included for preparing fluorocarbon coating, comprising: (i) uniformly mixing component-A raw materials by mechanical stirring and filtering to obtain component A, then storing in a dry air-tight container; (ii) uniformly mixing component-B raw materials (except leveling agent) by stirring, grinding via sand mill to a particle size of less than or equal to 5 mu m, adding leveling agent, mixing and filtering to obtain component B, then storing in a dry air-tight container; and (iii) uniformly mixing component-A and component-B by mechanical stirring to obtain mixed coating, then uniformly coating on substrate material surface, drying the coating film having a thickness of 10-30 mu m, then curing at 145-180 degrees C for 3-10 minutes.