The invention relates to a method for preparing a Chinese medicine for treating yin-deficiency glaucoma, and belongs to the technical field of preparation methods of Chinese medicines. At present, the yin-deficiency glaucoma is treated by antibiotics and sulfonamides generally, and gastrointestinal tract reactions, crystalluria, hematuresis, tetter, medicinal fever and leucopenia can be caused bysulfamethoxazole for treating patients sometimes. In the technical scheme, the method comprises the following steps of: soaking 23 medicines: rehmannia root, figwort root, dwarf lilyturf turber, cochinchnese asparagus root, dendrobium, fragrant solomonseal rhizome, lily, tortoise plastron, root of red-rooted salvia, prepared rehmannia root, mulberry fruit, common selfheal fruit-spike, feather cockscomb seed, pale butterflybush flower, buerger pipewort flower, equisetum hiemale linne, chrysanthemum, mint, cicada slough, paper mulberry fruit, bat dung, fruit of princesplume ladysthumb and liquoric root in water, decocting over slow fire, filtering and removing dregs to obtain liquid medicine, namely the Chinese medicine for treating the yin-deficiency glaucoma. The method has the advantages that the prepared Chinese medicine has small toxic and side effects, a short treatment course and a high cure rate, and can prevent adverse effects generated by western medicines.