The present invention discloses a purely natural medicine which is used for treating diabetes. The medicine comprises the ingredients of the following weight percent: 5 percent of ginseng, 5 percent of radix astragali, 5 percent of dwarf lilyturf root, 5 percent of fructus schizandrae, 5 percent of prepared rhizome of rehmannia, 5 percent of corns officinalis, 5 percent of tuckahoe, 5 percent of pollen, 5 percent of rhizoma anemarrhenae, 5 percent of spiral alga, 5 percent of Chinese goldthread, 8 percent of jellyfish, 8 percent of oyster, 8 percent of sea clam, 10 percent of black snake, andsimilarly black thorny ant. The medicine can restore the hematopoietic function by improving the hematopoietic microenvironment, and comprehensively strengthening the physical functions which comprise restoring the pancreatic function, secreting enough insulin, and correcting the turbulence of bran metabolism; thus the blood bran and blood can be normal; a plurality of diabetic complications can be eliminated correspondingly so that the patient can be rehabilitated. The medicine has the functions of benefiting marrow, generating blood, activating blood circulation, dissipating blood stasis, restoring normal blood, and so on, and is mainly used for treating the diabetes.