The modified starch (pre gelatinized starch) production line selects corn starch, cassava starch, potato starch, etc. as the main raw materials according to the needs of different products. After adding an appropriate amount of water, the starch will be denatured through the high temperature and high pressure in the extruder cavity and the shearing effect of twin-screw on the materials. New functional groups will be introduced into the starch molecules or the size of starch molecules and the properties of starch particles will be changed, Thus, the natural properties of starch (such as thermal viscosity and its stability, freeze-thaw stability, gel strength, film-forming property, transparency, etc.) can be changed to make it more suitable for certain application requirements. The specially made twin-screw extrusion system melts and gelatinizes the starch, then extrudes it in sheet/granule form, and then through the drying and crushing processes to produce the modified starch finished product. The overall production process is completed at one time from feeding to finished product, with high automation, tight connection between equipment, and strict control of dust; The main materials of the whole line can be food grade stainless steel or general steel according to different application scenarios. Special parts such as extruder screws, cutters and other accessories can be processed and produced with high-strength special steel that is harmless to human body; This production line has a high degree of automation, stable product quality, continuous production (no less than 72 hours of continuous production), no waste, and low energy consumption; The modified starch products are widely used in the construction industry, coal processing, oil drilling, printing and dyeing, food and pharmaceutical industries.