Cereal conditioning porridge suitable for being eaten by diabetic patients comprises, by weight, 20-35 parts of oatmeal, 8-12 parts of water-soluble dietary fiber extractives, 3-8 parts of insolubility oat fibers, 4-8 parts of rice krispies, 0.3-2 parts of wheat germ extractives, 1-3 parts of yam extractives, 0.5-2 parts of rhizome extractives, 0.5-2 parts of mulberry leaf extractives, 0.5-2 parts of polygonatum odoratum extractives, 0.2-2 parts of wolfberry extractives, 1-5 parts of L-arabinose, 0.08-0.3 part of chromium yeast and 0.002-0.006 parts of zinc gluconate. The cereal conditioning porridge is low in carbohydrate, full of nutriments, and very suitable for being used as the food for the diabetic patients, the hypoglycemic effect and the conditioning effect are obvious, a precaution and treatment effect is achieved on various complications of diabetes, and a good conditioning effect is achieved on diabetic nephropathy patients. The nutrients of the cereal conditioning porridge can be digested and absorbed easily, convenient to eat and delicate in mouthfeel.