The invention discloses a complex Chinese medicine preparation for reinforcing kidney, which is prepared by the following raw materials in parts by weight: 3-8 parts astragalus mongholicus, 6-10 parts Chinese yam, 5-12 parts rehmannia glutinosa libosch, 8-15 parts leech, 7-22 parts cogongrass rhizome, 15-20 parts gorgon fruit, 5-15 parts herba cepbalanoplosis segeti, 3-7 parts fructus rosae laevigatae, 6-20 parts madder, 4-15 parts pseudo-ginseng, 16-33 parts rhizoma nelumbinis, 14-32 parts unpolished rice root, 6-19 parts hairyvein agrimony, 5-15 parts angelica sinensis, 3-10 parts ginseng, and 6-15 parts rhizoma atractylodis macrocephalae. The complex Chinese medicine preparation is taken orally by chronic nephritis patients, so that urea nitrogen can be reduced; proteinuria is reduced; the kidney is reinforced; and the complex Chinese medicine preparation has the efficacies of tonifying spleen, tonifying kidney, inducing astringency, astringing to arrest bleeding and cool blood, and removing heat to promote salivation, and has obvious effects on deficiency of the spleen and kidney, functional metrorrhagia, extravasation of blood, release of sperm of chronic nephritis.