The working principle of Dongguan Gaosi feeding system is to use vacuum conveying method, and then transport plastic raw materials from the storage tank to the dehumidification and drying system through a centralized pipeline system, and then transport the dried raw materials to each injection molding machine. It is used in conjunction with a dehumidification and drying system. After the dehumidification and drying cycle, the conveying pipeline will be cleaned to ensure that there are no residual particles in the pipeline. This not only avoids moisture regain of the raw materials, but also ensures consistent performance of the raw materials added to the injection molding machine. Under the action of vacuum negative pressure, the original dust in the raw materials will be filtered out through the dust filtration system, ensuring that the air in the entire system can transport the raw materials and help improve the quality of the formed products. At the same time, stable operation and material blockage occur in each transmission.