The invention discloses a formula and preparation technology of a polysaccharide body capable of strengthening immunity of human bodies. The formula consists of the following raw materials in parts byweight of 8-10 parts of hemp seeds, 6-8 parts of bamboo funguses, 2-4 parts of stropharia rugosoannulata, 6-10 parts of hericium erinaceus, 9-11 parts of hippophae rhamnoides fruits, 9-11 parts of ginseng, 7-9 parts of raisin tree seeds, 7-9 parts of cordyceps militaris, 5-7 parts of lily bulbs, 5-7 parts of poria cocos, 5-7 parts of peach kernels, 3-5 parts of grape seeds, 1-5 parts of lotus leaves, 3-5 parts of purple sweet potatoes, 3-5 parts of ginkgo seeds, 7-11 parts of shiitake mushrooms, 3-5 parts of field thistle herbs, 0.5-5.5 parts of thallus laminariae, 3-5 parts of Chinese wolfberry fruits, 4-10 parts of aloe barbadensis miller gel, 0.6-0.8 part of perilla frutescens and 1.2-1.8 parts of honeysuckle flowers. The polysaccharide body is prepared through the steps of performingtreatment with salt water, performing treatment with sodium pyrosulfite, performing extraction for the first time, performing extraction for the second time and performing mixing. Herbaceous plants are selected as the raw materials, and a specific technology is adopted, so that polysaccharide in the herbaceous plants is effectively extracted, the requirements of human bodies for the polysaccharideare met through direct intake of the polysaccharide, and the polysaccharide body has the significant effects of whitening skin, dispelling freckles, enhancing body immunity, loosening bowel to relieve constipation, protecting the liver, preventing cancer and resisting cancer.