Sweet potato flour and wheat flour as raw materials, we developed a new type of Hunan taste sweet potato extrusion puffed food. The influence of the amount of sweet potato flour, wheat flour, water, salt added on the quality of Hunan taste sweet potato extrusion cooked food were studied. Results showed that the best formula of extruded Hunan taste sweet potato was sweet potato flour 36. 77% , wheat flour 36. 77% , water 18.57% , sodium ch...