The invention provides an oral traditional Chinese preparation for treating nephritis. The oral traditional Chinese preparation is prepared from the following raw materials in parts by weight: 8-10 parts of annual fleabane herb, 2-6 parts of ginseng fruit, 5-7 parts of pilose gerbera herb, 8-10 parts of multibract raspberry root, 2-4 parts of desmodium triflorum, 5-7 parts of elsholtzia penduliflora, 10-12 parts of semen canavaliae root, 4-6 parts of Chinese alangium leaf, 10-18 parts of mulberry leaf, 12-16 parts of kudzuvine root, 4-6 parts of dried peppermint leaf, 10-14 parts of radix scutellariae, 10-16 parts of rhizoma smilacis glabrae, 4-6 parts of borneol, 6-8 parts of radix notoginseng, 8-10 parts of angelica, 5-7 parts of tabasheer, 6-8 parts of chuanxiong rhizome, 5-7 parts of red peony root and 1-3 parts of nutgrass galingale rhizome, wherein all the raw materials are dried products. The oral traditional Chinese preparation has the beneficial effects of good curative effect, quick acting, low possibility of recurrence, few toxic and side effects, moderate cost, low dosage, controllable quality and good stability, and is convenient for administration, storage and carrying.