The invention discloses a Chinese herbal preparation for treating the diabetic nephropathy. The Chinese herbal preparation is prepared from the following raw materials in parts by weight: 30-50 parts of safflower, 30-50 parts of peach kernels, 30-50 parts of angelica, 30-50 parts of szechuan lovage rhizome, 20-40 parts of caulis milletiae, 20-40 parts of pericarpium arecae, 20-40 parts of cassia twig, 20-40 parts of radix linderae, 20-40 parts of radix paeoniae alba, 10-20 parts of wax gourd seeds, 20-30 parts of salvia miltiorrhiza, 20-30 parts of cherokee rose fruits, 20-30 parts of membranous milkvetch roots, 20-30 parts of cinnamon, 10-20 parts of achyranthis roots, 10-20 parts of roots of rehmannia, 10-20 parts of common clubmoss herb, 10-20 parts of beautiful sweetgum fruits, 10-20 parts of fructus alpiniae oxyphyllae, 20-40 parts of curcuma aromatica and 20-40 parts of liquorice. The Chinese herbal preparation provided by the invention has efficacies of expelling toxin, inducing diuresis and reducing swelling, has a determined curative effect, has the advantages of low price, easiness in preparation and the like, is easily accepted by patients, can delay the progress of the diabetic nephropathy, can be an important measure of a conservative treatment for the diabetic nephropathy at the azotemia period, and has a very high clinical practical value.