The petroleum resource is being exhausted and the conventional plastic industry. Which uses petroleum as main raw material, is facing a hard situation. The degradable plastic, which uses reproducible material as main raw material, is the best substitute of conventional plastic. Meanwhile, the degradable plastic, which can be degraded in environment without any harm and have the same physical and mechanical performances as ordinary plastic products and some other special performances, is wildly applied nowadys. 1. Applicable in industry and agriculture. It can make many diferent products, such as agricultural film, construction film, wrapping materials for timbers, water -protection material for soil and desert, paper film or paper replacing materical, package of fertilizer and pesticide, fishing tools, fishing net etc. 2. Application in daily life: It can make food wrapping bags, wrapping carton, fine chemical wrapping film, disposable meal kichenware, beverage bottle, disposable ball pen, paper bags, handbags, open-air tourist articles. Leisure goods etc 3. Because of the special performance of the degradable plastic, its application is expanding progressively, such as: Textil, wrapping of various materials, slow releasing material of solid water, human systemic project, stationery and sports goods, toy etc.