? ? In the past 20 years, with the development of automobile, sports equipment transportation, office automation equipment, packaging industry and other new applications, blow molding technology development is very rapid. The beverage industry in the development of our country, the beverage manufacturers in the continuous production of a variety of beverages, rich in the consumption of the entire beverage market. Among them, the injection - pull - blow molding PET bottles with good barrier properties, high corrosion resistance, high mechanical properties, transparent, can be recycled, and many other advantages, is widely used in a variety of beverage packaging. At this stage, the domestic 70% of the beverage packaging are using PET material as a carrier, PET bottle of the annual consumption of nearly 10 billion. The process of producing PET beverage bottle is necessarily related to the mold design and the analysis of the whole process of blow molding process. With the rapid development of CAD / CAE / CAM computer software technology, the blow molding process become more professional, efficient, both in improving productivity and ensuring the quality of the products or in reducing the cost and reducing the labor intensity aspects, than in the past have great advantages.