The invention provides a preparation method of fresh ginger liquid shampoo. The preparation method of fresh ginger liquid shampoo comprises the following steps of: heating a proper amount of distilled water to 80 DEG C, sequentially adding 1-3% of phthalic acid, 0.5-4% of glycol stearate, 5-10% of sodium dodecyl alcohol ether sulphate and 3-5% of cocamidopropyl while stirring, stirring until the added components are dissolved, cooling to 60 DEG C, adding 1-5% of ammonium lauryl polyether sulphate, 3% of cocoamidopropyl betaine, 1-2% of EDTA-2Na and 1-2% of emulsified silicone oil, stirring, adding 5-30% of gingerol when the temperature of paste is reduced to 40 DEG C, and fully and uniformly stirring. The fresh ginger liquid shampoo contains the gingerol component, so that hairs can be cleaned, scurf can be removed, hair loss can be prevented, blood circulation of the head can be promoted, hair roots can be strengthened, and the hair roots and hairs can be protected; besides, the yield and content of an gingerol extraction method are higher than those of a common water extraction method; compared with the prior art, the fresh ginger liquid shampoo has a better scurf removing and itching relieving function, is safe, produces no side or toxic effects and can be used for a long term by consumers.