The invention belongs to the technical field of food processing. In order to solve the problems that the processing cost of conventional potato whole flour is higher, the processing procedures are complex, during making staple food products with the conventional potato whole flour, the forming is difficult, the hardness is high, the staple food products are not resistant to boiling, the content of the potato whole flour is low, the cost of making cooked potato food is high and the like, the invention provides special potato noodle type powder for using potatoes as staple food. A preparation method of the potato whole flour comprises the following steps: choosing raw materials, cleaning the chosen raw materials, removing skins of the potatoes, selecting the potatoes of which the skins are removed, cutting the selected potatoes into slices, blanching the potato slices, cooling the blanched potato slices, drying the cooled potato slices and milling the dried cooled potato slices; mixing the potato whole flour, wheat flour and potato starch to be made into noodles. The preparation process is time-saving, simple and convenient, the noodles are popular and suitable for people to eat, the popularization is facilitated, and the quality is steady; the noodles are easy to form, tenacious, comprehensive in nutrition and good in taste; the content of the potato whole flour is more than 50%, any food additive is not added, safe, healthy environment-friendly food is ensured, the situation that the potatoes are consumed as the staple food is facilitated, the sustainable development of agriculture of China is facilitated, and the special potato noodle type powder is good for nutrition and health of people.