The invention discloses coffee with blood-glucose-decreasing and health-preserving functions. The coffee with the blood-glucose-decreasing and health-preserving functions comprises the following raw-material components in percentage by weight: 15-25% of instant coffee powder, 5-20% of acanthopanan trifoliatus polysaccharide extract, 15-30% of milk powder, 2-10% of non-dairy cream and 25-40% of sugar powder. The acanthopanan trifoliatus polysaccharide extract in the coffee has the functions of dispelling wind, dispersing dampness, clearing away heat, detoxifying, relaxing muscles and joints, promoting blood circulation and so on; the instant coffee powder is rich in substances such as proteins, fat, sucrose, starch, caffeine and so on, and has the effects of resisting oxidation, protecting the heart, strengthening the bones and the muscles, benefiting the waist and the knees, promoting appetite and digestion, lowering blood lipid, removing food retention, promoting defecation and urination, dispersing dampness, promoting blood circulation, removing blood stasis, subduing liver-wind, arresting convulsion and so on; moreover, the instant coffee powder is capable of promoting metabolism functions and eliminating fatigue. Thus, the coffee disclosed by the invention has obvious healthcare functions of reducing blood glucose due to organic combination of the acanthopanan trifoliatus polysaccharide extract with the instant coffee powder; moreover, the coffee is balanced in nutrition, and is capable of effectively improving life qualities of the people.