The invention discloses a high-definition transparent household purifying film and a preparation method thereof. The high-definition transparent household purifying film is prepared from the following raw materials in parts by weight: PVC (polyvinyl chloride) resin, a plasticizer, a cold-resistant agent, talc powder, a liquid flame retardant, a PVC stabilizer, a nontoxic plasticizer, a co-solvent, cypermethrin, a dispersant, a wetting agent, silver ion powder, a color master batch, titanium dioxide powder, and ultramarine blue powder, wherein the nontoxic plasticizer is epoxidized soybean oil, the plasticizer is p-phenyl dioctyl dimethyl, and the cold-resistant agent is dioctyl adipate. The raw materials selected by the invention are nontoxic and harmless and accord with environmental protection requirements, the obtained purifying film is high in transparency, is clear and glossy, is good in softness and strong in toughness, has flame-retardant and cold-resistant properties, is soft and plump in tactile impression and exquisite in texture, and master batches are prepared from cypermethrin, silver ion powder, titanium dioxide powder and the like, so that the high-definition transparent household purifying film has the characteristics of decomposing formaldehyde, removing peculiar smells, sterilizing, preventing mildew and insects, and prolonging the service life of a floor or furniture.