Pre gel starch production line adopts the twin-screw extruder technology to process the corn starch, cassava starch, or potato starch to pre-gel starch by changing the performance and function of the raw material. Hot extrusion process with high temperature, high pressure, short time, low moisture. Compared with traditional production processes, this type of production process is shorter, that can reduce production costs and energy Pre gel starch machine with the advantage of high efficiency, small footprint, convenient operation, no sewage generation, environmental protection. The twin-screw extruder has higher mixing efficiency, ood process control. It is an economical and feasible processing method for the rapid and continuous production of various modified starch.