The invention discloses a medicament for preventing or treating cardiovascular and cerebrovascular diseases. The medicament comprises the following natural bulk pharmaceutical chemicals in parts by weight: 3-5 parts of gambir plant, 3-5 parts of red paeony root, 3-5 parts of oriental waterplantain rhizome, 5-8 parts of Spanishneedles herb, 3-5 parts of rehmannia root, 2-3 parts of photinia stem, 15-30 parts of chrysanthemum, 5-10 parts of barbary wolfberry fruit, 10-15 parts of green forsythia and 10-20 parts of shanzhi. The medicament has functions of inhibiting thrombosis, obviously increasing cerebral blood flow, dissolving thrombus, inhibiting platelet aggregation, reducing miocardial infarction area, reducing the total peripheral resistance of blood vessel and increasing cardiac coronary artery flow, can prevent or treat the diseases such as chest distress, angina, insomnia, headache, hemiplegia caused by cardio-cerebral vascular embolism, limbs stalemate, dribbling, local numbness, skin blood capillary burst and sciatica, and has specific curative effect on the cardiovascular and cerebrovascular diseases such as apoplexy, coronary heart disease, cerebral hemorrhage, cerebral thrombosis and other symptoms; and moreover, the medicament is a pure traditional Chinese medicine preparation, which has the advantages of reasonable formula, low cost, simple processing and obvious clinical effects and is highly praised by the patients and family members of the patients.