Polylactic acid (PLA) is a new bio-based and biodegradable material, which takes corn, cassava and other crops as raw materials. Polylactic acid (PLA) is a new type of polyester material produced from organic lactic acid. Its performance is better than that of the existing plastic PE, PP, PS and other materials. It is regarded as a promising new packaging material in the new century , and it is a star of environmental protection packaging materials with various applications featured with good biodegradability, good mechanical and physical properties, good biocompatibility. At present, a production line with annual output of 55000 tons will be installed and put into production in October, which can produce PLA of fiber grade, extrusion grade, injection grade and other levels.