The dietary milkshake in Yuan Dynasty was made of flaxseed, agar oligosaccharide, chitosan oligosaccharide, vitamin, L-carnitine and mogroside. It can not only provide necessary nutrition for human body quickly and conveniently, but also has the characteristics of high fiber, low calorie and easy satiety. On the premise of ensuring a balanced nutrition, people can control their weight by controlling their calorie intake.