The invention relates to a method for making purple sweet potato nutrient buns and belongs to the technical field of food. The method for making the purple sweet potato nutrient buns is provided. The method includes the following steps that 1, peel of purple sweet potatoes is removed, the peeled purple sweet potatoes are placed in saturated steam with the pressure of 0.2-0.4 MPa to be heated for 15-30 min, water is added into the peeled purple sweet potatoes, and juicing is conducted; 2, flour, sugar, baking powder, egg white, yeast and purple sweet potato juice are evenly mixed, and water is added to knead dough; 3, static fermentation is conducted; 4, the well fermented dough is rolled into wrappers, and after wrappers are filled with fillings, semi-finished products are obtained; 5, the semi-finished products are placed in a condition with the temperature of 30-50 DEG C for fermentation for 15-25 min; 6, the semi-finished products are put in a oven to be steamed, and the purple sweet potato nutrient buns are obtained. The method for making the purple sweet potato nutrient buns is simple, the raw materials are easy to obtain, and the cost is low. The method can significantly improve the molding rate of the buns, and the obtained buns are good in taste and rich in amino acid, vitamins, anthocyanins and other beneficial substances and can effectively complement nutrition necessary for the human body, improve human immunity and promote the production of cytokines.