Abstract: The paper proposed a design scheme of control system of flywheel battery based on dsPIC30F3011 according to charge-discharge process of flywheel battery. It gave structure and control principle of the system and introduced design of hardware and software of the system in details. The debugging result showed that the system fully makes use of high-speed calculating ability and rich chip peripheral resources of dsPIC30F3011, and makes flywheel battery not only has good steady characteristics but also higher dynamic quality in energy storage process.