The invention discloses health-maintenance green soybean jam and a preparation method thereof. The health-maintenance green soybean jam is prepared from the following raw materials in parts by weight: 30-35 parts of green soybeans, 5-8 parts of mulberries, 3-5 parts of plums, 3-5 parts of apricots, 2-3 parts of apples, 2-3 parts of cherry tomatoes, 1-2 parts of orange seeds, 1-2 parts of strawberry leaves, 1-2 parts of pseudo-ginseng, 1-2 parts of circium japonicum, 0.8-1.2 parts of vitex leaves, 1-1.5 parts of cassia seeds, 2-3 parts of fingered citron, 0.8-1.5 parts of epimedium, 2-3 parts of cortex mouton, 1-1.4 parts of codonopsis pilosula and 0.6-1 part of gynostemma pentaphylla. The health-maintenance green soybean jam is unique in taste and comprehensive in nutrition; the green soybeans are combined with fruits such as the plums, the apricots, the mulberries, the apples and the oranges for eating; various dietary requirements of people can be met; important ingredients such as the pseudo-ginseng, the codonopsis pilosula and the cortex mouton are added as auxiliary materials, so that the pressure and the sugar can be reduced, the immunity of a human body can be improved, a disease can be prevented, the mutation also can be prevented, and the cancer incidence rate can be reduced; the health-maintenance green soybean jam is a health-maintenance healthcare product.