The invention discloses a multigrain food with a health preserving and blood pressure decreasing function. The multigrain food is composed of, by weight, 500g of buckwheat, 350g of sticky rice, 100g of maize, 1000g of wheat, 50g of sweet potato powder, 55g of natto, 25g of red rice, 45g of fermented glutinous rice, 50g of honey, 250g of nuts, 30g of codonopsis pilosula, 35g of bighead atractylodes rhizome, 25g of radices rehmanniae, 30g of eucommia ulmoides, 35g of gorgon euryale seeds, 50g of medlar, 35g of Chinese yam, 50g of hawthorn, 30g of semen coicis and 30g of lotus seeds. According to the multigrain food with the health preserving and blood pressure decreasing function, all raw materials are natural multigrain, the food tastes sweet and is low in calorie, high in protein content and low in fat content, cardiovascular and cerebrovascular diseases can be prevented or treated after the food is eaten for a long time, cholesterol can be lowered, blood pressure can be decreased, a tumor can be prevented, and body immunity of people can be obviously improved.