Green design of hydraulic system in plastic injection machine includ energy saving, noise reduction, leakage pro- tection and pollution protection, etc, which have certain technology to achieve. The green design, dvantages and disadvanta- ges of hydraulic system are described to injection molding machine in detail, and the auther give the aclvice that should be based on the technology of injection molding products, research and development level of the key equipment, choosing the suitable...