The invention discloses a processing method of crystal potato cakes, and belongs to the field of food processing. The processing method is characterized in that the formula adopted by the crystal potato cakes comprises 650g of potato starch, 200g of corn starch, 150g of mashed green soybeans, 100g of lily root flour, 230g of malt sugar, an appropriate amount of water, and an appropriate quantity of sweetened bean paste fillings. The processing method comprises the following processing technological processes of preparing raw materials, compounding the raw materials to obtain pulp, pouring boiling water, concocting to obtain dough, wrapping the fillings, forming raw crystal cakes, steaming the raw crystal cakes, cooling the steamed crystal cakes, packaging the cooled crystal cakes, and refrigerating the packaged crystal cakes. The processing method has the beneficial effects that the products made by the processing method disclosed by the invention are fragrant, glutinous and soft, fine, smooth and gentle in mouth feel, and fragrant, sweet and delicious, and have peculiar delicate fragrance and sweetness of potatoes. The crystal potato cake products are very high in nutrient value, rich in various nutrient substances including protein, vitamins and the like, are favorable for human bodies to digest and absorb foods, and capable of improving the immunity of the human bodies, and have the efficacies of invigorating the spleen, regulating the function of the stomach, benefiting qi, regulating middle energizer, expelling toxins, nourishing faces, reducing blood pressure and resisting ageing. The crystal potato cakes are green nutrient foods which are suitable for old people and young people, are economical and practical, capable of being stored for a long time, and convenient to carry, and can be used as dry provisions for travelling and fast foods.