The invention relates to a protection coating of an air conditioner installation copper tube for smart home indoor decoration. The protection coating is prepared from epoxy acrylic resin, low density polyethylene, alpha-olefin elastomer, trichloroethyl phosphate, modacrylics fibers, polyethylene wax, triethylene glycol Di-2-ethylhexoate, chlorothalonil, dodecyl dimethyl benzyl ammonium chloride, diazolidinyl urea, propiconazole, carbendazim, lithium phosphate powder, porcelain cement, calcium acetate, titanium nitride powder, zeolite powder, sodium dihydrogen phosphate, disodium hydrogen phosphate, barium sulfate powder, lead oxide powder, baryta powder, diethylene glycol monoethyl ether, camphor oil, fatty acid sodium, decalin, alkyl polyglycoside, glycol dimethacrylate, tert-butyl hydroperoxide and sodium akylbenzene sulfonate. The product has excellent flame retardance, acid-base resistance, and mildew preventing and antibacterial performance, and the product performance is improved.