For many natural plant fibers (such as wood, bamboo, crop straw, etc.), the quality of the raw materials that can be used for extrusion must go through pre-treatment processes such as glass, grinding, screening, drying, and mixing. To improve the defects and deficiencies of a single material during the extrusion process. For fibers that are suitable for extrusion, the particle size should be appropriate, and various additives such as coloring agents, lubricants, coupling agents, or foaming agents should be added. In the high-speed mixing unit, they can be fully mixed and further dehydrated to meet the requirements for extrusion.