The current non-petroleum based biodegradable plastics could be divided into three types of starch, chemical (artificial) synthetic and natural polymers (based on starch), and synthetic polymer blend. Starch based biodegradable plastics could be completely biodegradable and be made into thin film with the advantages of good transparency, flexibility, tensile strength, water-insoluble and non-toxic features. Therefore the market share of starch based biodegradable plastics is big, and it is widely used in food packaging as food containers and disposable tableware. The biodegradable plastic mechanical property of polylactic acid is similar to that of polypropylene, and it has the glossiness, clarity and workability similar to those of poly propylene with characteristics of non-toxic, non-irritating, high strength, easy processing and good biocompatibility. Polylactic acid is a kind of biodegradable plastic which could truly realize the dual benefits in ecology and economy with the fastest development. The biodegradable plastic comprehensive properties of butylene succinate are excellent with reasonable cost performance, so it has good application prospect in the fields of food packaging, disposable tableware, packing bottle for medicine, biomedical polymer materials, and auto parts etc. As the packing material, non-petroleum based biodegradable plastic is the inevitable trend with the focus in improving the modified technology and cost control, ensuring non-toxic and harmless to human body, emphasizing individuality, and paying attention to improving the market adoption.