The invention provides a double-fungus co-fermented aronia melanocarpa Elliott dry yoghurt and a preparation method thereof. The double-fungus co-fermented black aronia melanocarpa Elliott dry yoghurtcomprises components of aronia melanocarpa Elliott, eurotium cristatum and kelp emericellopsis. The preparation method comprises the following steps: fermenting aronia melanocarpa Elliott pulp and nut powder by a eurotium cristatum suspension and a kelp emericellopsis seed solution, then performing mixing with liquid yoghurt, pouring the mixed solution into a mould, and performing freezing and drying. The dry yoghurt provided by the invention has rich taste, strong milk flavor and fine texture, is rich in activity and nutrients, and is beneficial to human health, activity and nutrition of theinherent beneficial bacteria in the liquid yoghurt are retained, and health-care efficacy of the dry yoghurt is enhanced. The method of making the dry yoghurt is simple and does not need addition ofany additive, so that production cost is reduced and harmful effects of the additive are reduced. In addition, the dry yoghurt product subjected to freeze-drying is easy to store and carry, and has abroad market application prospect.