The invention belongs to the technology of Chinese patent medicine. The proposed medicine for treating hydrocephalus, brain abscess, and brain tumor is a medicament made of the following raw materials in weight ratio: Angelica dahurica 25-30, Trichosanthes 15-20, Alisma 25-30, and Kelp 10-15 , seaweed 10-15, white poria cocos 25-30, scutellaria baicalensis 15-18, cork 10-25, Nepeta 10-15, Cimicifuga 15-20, angelica tail 10-15, chuanxiong 15-20, chuanwu 10- 35, cassia twig 15-20, antler 10-15, hippocampus 15-20, bezoar 1-3, musk 0.1. The preparation method of this medicine is that the preparation of Scutellaria baicalensis wine, the preparation of Sichuan Wu vinegar, and the frying of Cortex Phellodendri (according to traditional crafts) are processed respectively and then dried, and pulverized together with the above-mentioned components, fully mixed with musk, and then packed into No. 0 capsules (grain weight 0.5 g) to obtain the drug. The invention has the effects of reducing intracranial pressure, improving cerebral microcirculation, and eliminating intracranial edema, hematoma, abscess, cyst and brain tumor.