The invention provides a water feeding pipe and a preparation method thereof and relates to the technical field of plastic pipes. The water feeding pipe comprises, by weight, metallocene linear low density polyethylene, chromium carbonate, fumed silica, nano-active calcium carbonate, metallocene linear low density polyethylene wax, phthalate, gamma-aminopropyltriethoxysilane, rose essential oil, dibutyltin dilaurate, a modifying aid, aluminum hydroxy distearate, hollow glass microbeads, aluminum hydroxide, nano zirconium carbide, aluminum silicate, glass fibers, a thermal stabilizer, a photo-stabilizer, an antioxidant, a compatilizer, and a plasticizer. The preparation method includes the steps of: 1) weighing raw materials; 2) performing granulation; 3) performing mixing, kneading, cooling, extrusion and shaping. The water feeding pipe has high mechanical strength, good flame retarding property, good toughness and good anti-aging performance.