This is a physical and biochemical composite treatment method. The mechanism is to use the screw extrusion method to send the corn stalk to the extruder. The screw screw pushes the material to form the axial flow, and at the same time, due to the spiral and the material, the material and the barrel, and the inside of the material. Mechanical friction, the material is strongly squeezed, stirred, sheared, so that the material is refined and homogenized. As the pressure increases, the temperature rises correspondingly. Under the conditions of high temperature, high pressure and high shear force, the physical properties of the material change, from powder to paste. When the paste material is ejected from the die hole, under the strong pressure difference, the material is puffed, dehydrated, and cooled, resulting in a loose, porous, crispy structure, which has better palatability and flavor. favorite. From the biochemical process, the maximum temperature during extrusion is 130 ° C ~ 160 ° C. It can not only kill germs, microorganisms, eggs, improve health indicators, but also inactivate various harmful factors, improve feed quality, eliminate various harmful factors that contribute to material deterioration, and extend the shelf life.