The invention relates to a traditional Chinese medicine for treating IV stage diabetic nephropathies, and can effectively solve the problem of therapeutic medication of the IV stage diabetic nephropathies. According to the technical scheme for solving the problem, the traditional Chinese medicine is prepared from 30g-60g of herba agrimoniae, 15g-30g of cortex cinnamomi, 10g-20g of raw rhizoma atractylodis macrocephalae, 10g-20g of semen allii tuberose, 10g-20g of folium microcotis, 10g-20g of flos gossampini, 10g-20g of herba saururi chinensis and 5g-10g of raw licorice roots; after the components are mixed, drinking water 10 times the weight of the mixed raw materials is added to soak the mixed raw materials for 30 minutes, mixed raw materials are decocted with a strong fire, and then, are decocted with a mild fire for 30 minutes, and filtering is performed to obtain a first-time filtrate; then, the drinking water 8 times the weight of the mixed raw materials is added into herb residues, the herb residues are decocted with the strong fire, and then, are decocted with the mild fire for 25 minutes, and filtering is performed to obtain second-time filtrate; and the first-time filtrate and the second-time filtrate are combined, and the combined filtrate is decocted with a medium fire to make the combined filtrate concentrated to 300-500 mL. The traditional Chinese medicine has theadvantages that the raw materials are abundant, and the traditional Chinese medicine has scientific and reasonable matching, is easy to produce and prepare, convenient to take, has a good effect, haseffects of reinforcing qi and warming yang and promoting dieresis and clearing heat, can effectively treat the IV stage diabetic nephropathies, and has enormous economic and social benefits.