Abstract: The principle, structure, measured result and technical performance of micro-wave drive system for 100 MeV electron linear accelerator are presented. In thissystem the peak power of 15 kW is produced by the middle power klystron. Thepower is divided into 6 parts, as it passes through the microwave output deviceand 6 high power klystron are drived. The result show this system has simplestructure and good characteristic. This system completely satisfies acceleratorrequiement.