NOVELTY - A nanolipid sun-proof microparticle suspending liquid comprises UVA sun screening agent, UVB sun screening agent, solid lipid, emulsifier, preservative, and water. The solid lipid is aliphatic acid, aliphatic alcohol, fatty glyceride, natural wax or compounded wax. The emulsifier is sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, fatty alcohol-polyoxyethylene ether, polyethylene glycol ester, ethoxylated castor oil, fatty acid monoglyceride, polyglycerol ester or sucrose monostearate.    USE - A nanolipid sun-proof microparticle suspending liquid.    ADVANTAGE - The suspending liquid provides preparation of lipid microparticle with simple technique, lesser steps, easily controlled procedure, avoids homogenization under high pressure, and safer operation; and has sun-proof function at wavelength of 290-400 nm.    DETAILED DESCRIPTION - Nanolipid sun-proof microparticle suspending liquid comprises (wt.%) UVA sun screening agent (0.1-20, preferably 1-10), UVB sun screening agent (0.1-20, preferably 1-10), solid lipid (2-20, preferably 3-10), emulsifier (1-15, preferably 2-10), preservative (0.01-1), and water. The solid lipid is aliphatic acid, aliphatic alcohol, fatty glyceride, natural wax or compounded wax. The aliphatic acid is dodecoic acid, tetradecanoic acid or octodecanoic acid. The aliphatic alcohol is hexadecanol, octadecanol or decanol. The fatty glyceride is glycerin monostearate, glycerin distearate or glycerin tristearate. The natural wax or compound wax comprises beeswax, ozokerite and paraffin. The emulsifier is sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, fatty alcohol-polyoxyethylene ether, polyethylene glycol ester, ethoxylated castor oil, fatty acid monoglyceride, polyglycerol ester or sucrose monostearate. The UVA sun screening agent is anthranilate ether, diphenyl ketone, methane, and their derivatives. The anthranilate ether is menthyl anthranilate or N-ethyl anthranilic trimethylcyclohexyl. The diphenyl ketone and its derivative is 2-hydroxy-4-methoxy diphenyl ketone, 2,2'-dihydroxy-4-methoxy diphenyl ketone, 2-hydroxy-4-methoxy diphenyl ketone, 2,4'-dihydroxy diphenyl ketone, 2,2'2,4'-tetrahydroxy diphenyl ketone, 2,2'-dihydroxy-4,4'-dimethoxy diphenyl ketone, or 2-hydroxy-4-N-ethoxyhexyl diphenyl ketone. The methane derivative is 4-methyl-4-ethoxybenzene oxy-methane or butyl methoxydibenzoylmethane. The UVB sun screening agent is p-aminobenzoic acid and its ester, salicylate and its derivative, diphenyl ketone and its derivative, p-methoxycinnamic acid, or camphor. The p-aminobenzoic acid and its ester is p-aminobenzoic acid, p-aminobenzoic glyceride, N,N-amyl dimethyl p-aminobenzoic acid, ethyl-4-di(hydroxypropyl) aminobenzoate or N,N-octyl dimethyl p-aminobenzoic acid. The salicylate and its derivative is phenyl salicylate, benzyl salicylate, menthyl salicylate or p-isopropyl phenyl salicylate. The p-methoxycinnamic acid is methylcinnamic monooctyl ester or methylcinnamic ethylhexyl ester. The preservative is p-hydroxybenzoate, phenylcarbinol, Phenoxetol(RTM: phenoxy ethanol), 2-bromo-nitropropane-1,3-propanediol, formamine derivative, imidazolidinyl urea, dehydroacetic acid, sorbic acid, monolauric acid glycerol ester, diazolidinyl urea, hydroxymethylhydantoin or dihydroxydimethylhydantoin. An INDEPENDENT CLAIM is included for a method of preparing nanolipid sun-proof microparticle suspending liquid by melting solid lipid, emulsifier and sun screening agent at 65-95 degrees C, and uniformly dispersing to obtain oil phase; mixing with water at 65-95 degrees C in which homogenizing velocity is at 8000-20000 rpm for 2-10 minutes; cooling for 30 minutes to 1 hour at 40-60 degrees C; stirring under 100-700 rpm, and adding preservative; and cooling for 30 minutes to 3 hours at 5-30 degrees C, and stirring under 100-700 rpm.