The invention provides a medicament for treating thrombocytolytic purpura, which comprises the following raw materials by weight part: 15-25 parts of rhizoma smilacis glabrae, 20-30 parts of honeysuckle, 10-20 parts of radix arnebiae seu lithospermi, 10-20 parts of rehmannia root, 10-20 parts of white mulberry root-bark, 25-35 parts of oyster, 10-20 parts of clerodendrum bungei, 10-20 parts of yellow celery and 5-15 parts of cicada slough. In the invention, the natural herbal drugs capable of clearing away heat and toxic materials, activating blood and dissolving stasis, cooling and nourishingblood and stopping bleeding, removing water and eliminating swellings are selected from the medicinal treasury of China, and play roles of clearing away heat, cooling the blood, stopping the bleeding, eliminating spots, activating blood and dissolving stasis, improving the microcirculation, dredging channels, diminishing pain, and the like according to a Chinese medicine theory formula. The medicament does not contain any chemical drugs, thereby being innoxious to human bodies; and the medicament is convenient to take, can enhance the resistance and the immunity of organisms and relieve pains of patients, and has obvious curative effect.