Twin screw extruder is a kind of production and processing equipment widely used in food industry and feed industry. Its applicable raw materials are mainly powder or fine granular cereals, starch, grain extracts and some animal products. According to product requirements, single materials can be used, or multiple materials can be used; The equipment uses twin-screw push extrusion to process materials under the action of reasonable temperature, pressure and shear force, so that materials can be extruded and cut through the mold. During this process, materials complete a series of changes in physical and chemical properties such as ripening, expansion and secondary molding. Twin screw extruders are widely used, mainly including snack food, cereal breakfast substitute food, soy protein, composite artificial rice, pet food, pre gelatinized modified starch, etc. With the development of technology, more and more traditional production methods have been replaced by twin-screw extruders. Compared with cooking, baking, frying and other food processing methods, their main advantages are high degree of automation, multiple use of one machine Large single unit output, low energy consumption under the same output. Twin screw extruder is mainly composed of six parts: extrusion system, electric control system, temperature control system, transmission system, feeding system and molding system; The steam conditioning system can also be used for wet expansion production as required. In actual production, only the production parameters need to be set, and all systems work together automatically, with strong stability and reliable quality.