The invention provides a salt complex for facial cleaning, a preparation method of the salt complex and a method for cleaning facial skin. The salt complex is prepared from 1 kg by mass of powder materials, 2-5 mL by volume of glycerin, 1-4 mL by volume of plant essential oil and 0.5-1.5 mL by volume of vitamin E, wherein the power materials comprise, by weight, 95-99 parts of rock salt, 0.5-1.0 part of sodium dodecyl sulfate, 0.1-0.4 part of salicylic acid, 0.1-0.3 part of glycocoll and 0.01-0.04 part of allantoin. The preparation method comprises the steps that the rock salt, glycocoll, salicylic acid and sodium dodecyl sulfate are stirred and mixed, the glycerin and the vitamin E are added, mixing is conducted, the rest raw materials are added finally, and mixing and stirring are conducted to obtain the salt complex; the salt complex for facial cleaning is adopted to clean the facial skin. The salt complex for facial cleaning has the effects of promoting skin metabolism, deeply cleaning the skin, diminishing inflammation and killing bacteria.