The invention discloses a traditional Chinese medicine preparation used for treating diabetic nephropathy in the elderly. According to the traditional Chinese medicine, by comprehensive analysis of the pathogenesis of the diabetic nephropathy in the elderly, the diabetic nephropathy in the elderly is diagnosed dialectically as kidney deficiency, turbidity and weakness, and phlegm and blood stasis transimpedance syndromes. Traditional Chinese medicines, which have effects of invigorating blood circulation and tonifying kidney, reducing phlegm and descending turbidity, removing stasis and dredging collaterals, and tonifying liver and kidney, comprising trichosanthes palmate, conic gymnadenia tuber, black swallowwort root, balanophora polyandra griff., root of procumbent indian mallow, petelot habenaria, kadsura heteroclite, tripterygium hypograucum, rubia yunnanensis, rhizoma arisasmatis, leontopodium leontopodioides and semen lepidii are selected and decocted with water to a decoction. By clinical experiments, the total effective rate is 97.3%, and the curative effect is superior to a control group. The traditional Chinese medicine preparation is deserved clinical application and popularization.