The invention relates to a medicament for treating cerebral infarction. A preparation method comprises the following steps: using gingko leaves, hawthorn leaves, angelica, rhizoma gastrodiae, caulis milletiae, sweetgum fruit, earthworm, uncaria, clematis root, dried orange peel and licorice as raw material drugs, adding water into the raw material drugs and decocting the mixture, condensing the decoction to be thick paste, drying and crushing the thick paste into medicinal powder, filling the medicinal powder into capsules, sterilizing and disinfecting the capsules to obtain the capsule preparation. The medicament treats both symptoms and root causes during cerebral infarction treatment, has the characteristics of definite effect and quick healing, has no toxic and side effect or allergic reaction, uses little amount of medicament, has low cost, has obvious effect on acute cerebral infarction, can also control disease development of chronic cerebral infarction, and is easy to be accepted by patients. The cure rate for treating the acute cerebral infarction is 96 percent, and the cure rate for treating the chronic cerebral infarction is 93 percent.