This machine is specially designed and the barrel and screws structure are properly adjusted for the purpose of widening the extruding and inflating function. The modified starch serial products made from this machine can be used in many fields like spinning, food, paper making, building material, casting, oil drilling and so on. The extruders will definitely play a more important role in modified starch (pregelatinization starch)manufacture field with the research development. The machine is made up of feeding system, extruding system, cutting system, heating system, conveying system and cooling system. At the same time, we can provide special design according to clients requirements.