NOVELTY - Fruit tree low temperature-resistance protecting film comprises sodium hexametaphosphate, sodium polyacrylate, 2-amino-2-methyl-1-propanol (AMP-95), lauryl alcohol ester, polypropylene glycol, ethylene glycol, far infrared ceramic powder, thiophanate-methyl, titanium pigment, hydroxyethyl cellulose, copolymer emulsion and water. The copolymer emulsion comprises sodium sulfite, ammonia persulfate, polyvinyl alcohol, sodium dodecyl sulfate, non-ionic alkyl phenol polyoxyethylene ether, vinyl acetate, butyl acrylate, methyl methacrylate, micro-sodium bicarbonate and water.    USE - Used as fruit tree low temperature-resistance protecting film.    ADVANTAGE - The protecting film: utilizes the copolymer emulsion, which is further added with inorganic dispersant, organic dispersant, wetting agents, film forming agent, surfactant, anti-freezing agent, heat resistant material, fungicide and colloid functional material; has simple preparation process; is economical, safe and environmentally friendly; is free of hydrogel; has copolymer emulsion stability good film-forming effect; contains 44.5% solid and 19.66% water absorption property; can significantly improve fruit frozen injury response to low-temperature damage; and can prevent sunburn and sprout damage, delayed germination period.    DETAILED DESCRIPTION - Fruit tree low temperature-resistance protecting film comprises 0.0.3-0.7 wt.% sodium hexametaphosphate, 0.5-1 wt.% sodium polyacrylate, 0.2-0.3 wt.% 2-amino-2-methyl-1-propanol (AMP-95), 0.8-1 wt.% lauryl alcohol ester, 0.1-0.4 wt.% polypropylene glycol, 2.5-2.8 wt.% ethylene glycol, 2-6 wt.% far infrared ceramic powder, 0.08-0.1 wt.% thiophanate-methyl, 10-15 wt.% titanium pigment, 0.03-0.5 wt.% hydroxyethyl cellulose, 30-40 wt.% copolymer emulsion, and water (remaining amount). The copolymer emulsion comprises 0.01-0.15 wt.% sodium sulfite, 0.07-0.28 wt.% ammonia persulfate, 0.45-0.63 wt.% polyvinyl alcohol, 1.28-1.8 wt.% sodium dodecyl sulfate (SDS), 2.57-3.61 wt.% non-ionic alkyl phenol polyoxyethylene ether (OP-10), 25-30 wt.% vinyl acetate, 15-20 wt.% butyl acrylate, 1-5 wt.% methyl methacrylate, 0.5-1 wt.% micro-sodium bicarbonate (for pH adjustment), and water (remaining amount). An INDEPENDENT CLAIM is also included for preparing the fruit tree low temperature-resistance protecting film, comprises (i) preparing the copolymer emulsion by dissolving sodium sulfite and ammonium persulfate in 10-12% water to obtain a mixed solution of sodium sulfite and ammonium persulfate, adding 15-20% water to a reaction vessel, then gradually adding and dissolving polyvinyl alcohol, sodium dodecylsulfate, OP-10 and 5.53-29.12% water, repeatedly filtering to remove dissolved impurities, controlling temperature of water bath at 30 plus minus 2 degrees C, then dropwise adding mixture of vinyl acetate, butyl acrylate, methyl methacrylate and acrylic acid, where the mixture comprises 25-30% vinyl acetate, 15-20% butyl acrylate, 1-5% methyl methacrylate, and 0.5-1% acrylic acid, fully emulsifying, then dropwise adding sodium sulfate and ammonium persulfate into one-third of the mixed solution, adjusting pH to 6-7 with sodium bicarbonate, heating for certain time, dropping the remaining amount of sodium sulfite and ammonium persulfate mixed solution, heating for 2 hours, cooling the material to obtain the copolymer emulsion; and (ii) uniformly mixing the sodium hexametaphosphate, sodium polyacrylate, 2-amino-2-methyl-1-propanol (AMP-95), lauryl alcohol ester, polypropylene glycol, ethylene glycol, far-infrared ceramic powder, thiophanate-methyl and water, then adding the titanium pigment and hydroxyethyl cellulose, subjecting to high-speed dispersion to obtain homogenate, filtering the homogenate through 100 mesh sieve, then dropping the copolymer emulsion, and subjecting to low-speed stirring to obtain the protection agent.