The invention relates to an oral liquid for treating hemiplegia, which is prepared from the following raw materials in parts by weight: 90-180 of raw milkvetch root, 3-15 of Chinese angelica, 3-10 of red paeony root, 3-10 of earthworm, 3-10 of rhizome chuanxiong, 3-10 of peach seed, 3-10 of safflower, 5-15 of pueraria root, 2-5 of pseudo-ginseng, 8-15 of tall gastrodia tuber and 5-20 of zaocys dhumnade. Aiming at the etiology and pathogenesis of hemiplegia, the oral liquid is formed by scientifically matching primary components with secondary components in multiple factors and has the efficacies of tonifying qi and blood, promoting blood circulation and removing obstruction in channels, stanching, dispersing pathogenic wind, and the like. The oral liquid has the advantages of easily-obtained raw material, no toxic side effect and favorable rehabilitation effect, is prepared by a simple process and is convenient to take. By clinically implementing the test administration treatment on 863 hemiplegic patients suffering from cerebrovascular accident (stroke) for years, the oral liquid has remarkable curative effect for all the patients receiving the test administration treatment, wherein 820 patients are clinically healed; and the effective rate for treatment reaches 100 percent and the cure rate reaches 95 percent.