The invention discloses a Chinese medicinal lotion for treating pruritus vulvae and a preparation method thereof. The Chinese medicinal lotion is prepared from the following raw materials in parts by weight: 10-15 parts of lightyellow sophora root, 12-16 parts of selinum japenious seed, 10-15 parts of falsesour cherry leaf, 5-10 parts of wild chrysanthemum, 8-14 parts of mint, 5-10 parts of bottle gourd stem, 10-15 parts of amur corktree bark, 11-17 parts of bark of tree of heaven, 15-20 parts of Chinese trumpet creeper, 10-15 parts of saxifraga stolonifera, 6-12 parts of willow bark, 8-14 parts of bunge pricklyash leaf, 10-15 parts of philippine violet herb, 15-20 parts of Chinese brake herb, 14-18 parts of Chinese atractylodes, 16-22 parts of sessile stemona root, 10-15 parts of cortex pseudolaricis, 5-10 parts of common carpesium fruit, 10-15 parts of pink plumepoppy herb and 10-15 parts of Japanese ampelopsis root. The Chinese medicinal lotion has the effects of clearing away heat, drying dampness, diminishing inflammation, relieving pain, disinfecting, relieving itching, activating blood, diminishing swelling, astringing and promoting granulation, and has the advantages of definite curative effect, fast action, quick response, remarkable treatment effect on pruritus vulvae of women, no toxic or side effect, no irritation, prevention of relapse, safety and convenience; and the effective rate is up to 100 percent, and the curative rate is up to 97 percent.