The invention discloses a traditional Chinese medicine preparation for treating chronic nephritic syndrome and a preparation method thereof, and belongs to the field of traditional Chinese medicines. The traditional Chinese medicine preparation comprises the following raw materials with active ingredients of fomes officinalis, ardisia crispa, gentianopsis barbata, championella sarcorrhiza, caulis clematidis armandii, circium japonicum, wandering jew, philippine violet herb, root of delavay habenaria, hairy euphorbia, stephania longa, manyinflorescenced sweetvetch root, sticktight, lygodium japonicum, herb of thunberg's lepisorus, and sambucus adnata wall. The traditional Chinese medicine preparation has the advantages that the selected Chinese herbal medicines are properly compounded, supplemented and cooperated, the theories of traditional Chinese medicine and pharmacy and modern medicine and pharmacy are met, and the effects of diminishing inflammation and swelling, clearing heat and detoxifying, nourishing Yin and tonifying kidney, inducing diuresis and eliminating swelling, invigorating qi and strengthening superficies, and promoting urination and removing poison are realized; the convenience in use is realized, the absorbing effect is good, and any adverse effect and toxic or side effect are avoided; after proofing by clinical application, the effect of relieving and treating the chronic nephritic syndrome is good, and the traditional Chinese medicine preparation is suitable for being popularized and applied in clinical therapy and nursing of chronic nephritic syndrome.