【正文】 ina39。s own development of the plastic mould CAD / CAM system has achieved significant development, the main guarantor Software Engineering Institute, is the development of CAXA, Huazhong University of Science development of the system and injection mold CAE software, and so on, these Die of domestic software with the specific circumstances in the application of puter and lower prices, and other characteristics, in order to further universal CAD / CAM technology has created good conditions.In recent years, China has been more extensive use of some new plastic mold steel, such as: P20, 3Cr2Mo, PMS, SM Ⅰ, SM Ⅱ, and the quality of life of mold has a direct significant impact on the overall use of the still less . Plastic Moulds standard model planes, such as standard putter and spring has given more applications, and there have been some of the mercialization of domestic hot runner system ponents. However, at present China Die level of standardization and mercialization in the general level of below 30 percent and foreign advanced industrial countries has reached 70 percent pared to 80 percent, still a large gap. Table 1, at home and abroad plastic mould technology parison table，Domestic projects abroad cavity injection model accuracy of ~ ~ cavity surface roughness ~ μ μ m nonhardened steel die life 10 to 60 million 10 ~ 30 million hardened steel die life 160 ~ 300 million of 50 ~ 100 million hot runner mould overall utilization rate of more than 80 per cent less than 10 per cent level of standardization of 70 ~ 80% less than 30% of mediumsized plastic mould production cycle about a month 2 ~ 4 months in the mold industry in the amount of 30 to 40% 25 to 30% According to the parties concerned forecast, the market39。s industrial and technological plastic mould the future direction of the major developments will include: 1, raising large, sophisticated, plex, longlife mold design and manufacturing standards and proportion. This is due to the molding plastic mould products increasingly large, plex and highprecision requirements, as well as requirements for high productivity and the development of a multimode due. 2, in the design and manufacture of plastic mould fully promote the use of CAD / CAM / CAE technology. CAD / CAM technology has developed into a relatively mature technology mon in recent years CAD / CAM technology hardware and software prices has been reduced to SMEs generally acceptable level of popularity for further create good conditions。 CAD / CAM software will gradually improve intelligence plastic parts and the 3D mold design and prototyping process 3D analysis will be in our plastic mould industries play an increasingly important role. 3, promote the use of hot runn