The puffed grain food production line uses various natural grains such as corn, rice, oats, and wheat as the main raw materials, and uses twin-screw extrusion technology to produce various granular, flake, or special-shaped grain puffed foods such as corn doughnuts, cereal bars, cereal balls, cereal chips, etc; This kind of product can be used as both snack food and functional meal substitute food. The main difference is that the main nutrients and taste are different due to different raw materials; Representative products include egg milk stars, wheat flavored chicken nuggets, cocoa chips, purple potato doughnuts, sandwich rice nuts, etc. After extrusion processing, this kind of product has strong aroma of grains, easy to absorb nutrition, and can be eaten directly or brewed. It tastes crisp and melts in the mouth; It can be used as complementary food for children and substitute food for adults. The production process of the production line is simple, and the whole process from raw materials to finished products is uninterrupted and continuous without manual operation. The continuous operation time is not less than 72 hours, and there is no waste water or waste material discharged in the whole process; Its main equipment includes mixer (mixing raw materials), twin-screw extruder (extruding, curing and granulating), dryer (removing water and improving taste), spray flavoring machine (spray flavoring), etc; All equipment in contact with food shall be produced and processed with food grade materials that meet the requirements of food safety production. The whole line shall be customized in design layout. The supporting scheme and workshop layout shall be customized according to the actual needs of customers. The design output varies from 100 kg to thousands of kg.