The invention provides hair loss preventing shampoo and a preparation method thereof, and relates to the field of daily chemicals. The raw materials of the hair loss preventing shampoo comprise a fresh ginger extract, a radix sophorae yellowish sophora root extract, a platycladus orientalis branch tip and leaf extract, a rhizoma ligustici wallichii extract, sodium laureth sulfate, cocamide MEA, ethylene glycol distearate, cetearyl alcohol, cocamidopropyl betaine, Guar hydroxypropyltrimonium chloride, polyquaternary ammonium salt-10, sodium hyaluronate, citric acid, zinc pyrithione, dimethiconol, pyridoxine, carbomer, panthenol, phenoxyethanol, sodium benzoate, EDTA-disodium, CI16255, CI19140, CI42090, essence and the balance water. The shampoo prepared by a simple and convenient preparation method does not have nonirritant and sensitization effects on bodies, besides, is high in hair loss resistance and itching relieving properties and meets sense organ requirements of common people.