The invention provides a traditional Chinese medicament for treating diabetes. The traditional Chinese medicament is prepared from the following components in parts by weight: 10 to 20 parts of polygonatum, 10 to 20 parts of dendrobium nobile, 10 to 15 parts of radix pseudostellariae, 10 to 15 parts of eleutherococcus senticosus, 10 to 15 parts of bombyx batryticatus, 10 to 15 parts of red oranges, 10 to 15 parts of coix seeds, 10 to 15 parts of allium macrostemon, 5 to 10 parts of morinda officinalis, 8 to 13 parts of endothelium corneum gigeriae galli, 10 to 15 parts of glossy privet fruits, 5 to 12 parts of amomum villosum, 10 to 15 parts of sharpleaf galangal fruits and 10 to 15 parts of epimedium herb. According to the traditional Chinese medicament, the selected medicinal materials are pure traditional medicinal preparations without side effects on bodies, and the components are reasonably proportioned to achieve remarkable treatment effects on diabetes.