The invention relates to a traditional Chinese medicine composition for treating diabetes mellitus. The traditional Chinese medicine composition contains the following effective constituents: bamboo shoots, cassia barks, cape jasmine, Garter snakes, sea-buckthorn, radix angelicae and fructus citri. The traditional Chinese composition is specially used for treating complications of diabetes mellitus, such as foot diseases in diabetes mellitus, diabetic nephropathy, diabetic cardiopathy and eye diseasse in diabetes mellitus. The traditional Chinese medicine composition has the effects of dissolving thrombus, dredging and softening blood vessels and regulating blood sugar and can obviously improve lower limb vascular occlusion, renal function injuries, heart diseases and eye ground injuries caused by blood vessel pathological changes and diabetic neuropathy of diabetes mellitus patients, prompt the healing of diabetic foot ulcers, avoid the amputation of the patients, improve numb, cold, swelling, expanding and painful symptoms of lower limbs of the patients and improve the symptoms of yang deficiency, body cold and weak physique.