The invention discloses a yandang mountain acorus calamus root extracting solution and an application thereof in cosmetics. The extracting solution comprises the following components: alpha-asarone, beta-asarone, cis-methylisoeugenol, methyleugenol, calamendiol and acorone, and the cosmetics are an amino acid face cleanser. The amino acid face cleanser is prepared from the following raw materials: a phase A: 20%-23% of water, 0.03%-0.1% of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 3%-5% of glycerol, 0.3%-0.8% of glycereth-26 and 0.1%-0.3% of xanthan gum; and a phase B: 20%-30% of TEA-cocoyl glutaminate, 4%-6% of C30K, 10%-18% of RunmildTMCOP, 1%-3% of polyglycerol-10, 7%-9% of CHSB, and 1%-3% of PLANTACARE2000UP. The extracting solution has obvious anti-inflammatory activity and acne removal effect, can inhibit the generation of proinflammatory factors, has anti-inflammatory effect on acute, chronic and some immune inflammation models, has strong antibacterial effect on saccharomycetes and propionibacterium acnes, and has obvious inhibition effect on megalosporon, microsporum, aspergillus niger and candida albicans; and the extracting solution is applicable to face cleansing products.