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This invention belongs to the field of cosmetic technology and discloses a soothing and anti-hair loss hair growth liquid and its preparation method. The hair growth liquid is composed of a compound anti-hair loss active ingredient, a scalp soothing and repairing agent, a penetration enhancer, an alcohol solvent, a surfactant, a pH adjuster, a preservative, and water. The compound anti-hair loss active ingredient is obtained by gradient ethanol extraction and concentration of five raw materials, including Platycladus orientalis leaves and Drynaria fortunei, in a specific ratio. The scalp soothing and repairing agent is obtained by decoction and concentration of raw materials such as Salvia miltiorrhiza and Aralia elata root. During preparation, the final product is obtained through stepwise extraction, density control, specific sequential compounding, and low-temperature maturation processes. This invention, through the synergy of raw materials and processes, enables the product to have good effects in preventing hair loss, promoting hair growth, and soothing the scalp, and also exhibits good stability.