Compound liquid laundry detergent and preparation method thereof

The invention discloses a compound liquid laundry detergent and a preparation method thereof. The compound liquid laundry detergent comprises, by mass, 10 to 15% of fatty alcohol polyoxyethylene ether-9, 5% of fatty alcohol polyoxyethylene ether-7, 4 to 6% of sodium fatty acid methyl ester sulfonate, 4 to 6% of sodium dodecyl sulfate, 6 to 8% of cocamidopropyl hydroxysulfobetaine, 3 to 4% of dodecyl dimethyl benzyl ammonium chloride, 10% of propylene glycol, 2% of ethanol, 0.25% of a modified organosilicon antifoaming agent AFE-1410, 2% of an auxiliary agent, 0.03% of a fluorescent brighting agent CBS-X, 0.03% of essence, 0.01% of pigment and 1 to 3% of a thickening agent, with the balance being deionized water. Through mutual penetration and synergism of the raw materials, the compound liquid laundry detergent has the characteristics of better detergency, stability, low foam, softness, no harm to a water body, easy degradation, etc. The raw materials used for preparation of the compound liquid laundry detergent are easily available and environment-friendly; and the preparation method is simple and easily practicable.