Introduction and application of rotational molding process of plastic and composite materials, there are a variety of molding processes, including compression molding, extrusion, injection molding, transfer molding, blow molding, casting, laminating, calendering, coating, reaction injection molding and rotational molding (also known as rotating plastic, rotary molding) and so on. In various materials for plastic and composite molding process of the books, outside of the rotational molding process than introduce more, and for the rotational molding process, so far only seen in less than a few pages of the book's description. Plastics and composite materials have a variety of molding processes, including compression molding, extrusion, injection molding, transfer molding, blow molding, casting, laminating, calendering, coating, reaction injection molding and rotational molding (also known as rotating plastic, rotary molding) and so on. In various materials for plastic and composite molding process of the books, outside of the rotational molding process than introduce more, and for the rotational molding process, so far only seen in less than a few pages of the book's description. Overseas, the rotational already a widely used one of the plastic molding process. In this century, 40 years, starting with PVC paste method of production by rotational molding of plastic balls like toys and other products. 50 years, the development of low density polyethylene resin powder as the raw material of polyethylene rotational molding process, the production of polyethylene storage tanks, large pipes and other industrial products, thereby contributing to the development of rotational molding process. Since then, nylon, polycarbonate, ABS and other plastics also have using rotational molding process, to the early 70s, has become a large-scale rotational molding plastic molding process.