Laser-driven miniflyer system is characterized by high precision control in time, prompt initiation, anti EMI and reliable initiation, which meets the requirements of modern initiators. Due to low transmission and utilization efficiency of laser, it′s difficult to apply this system in practice. The velocity of laser-driven flyer in explosive detonation is predicted and the necessity of improving efficiency is put forward. Two key technologies in improving energy efficiency are highlighted and reviewed, including transmission through fibers and coupling with multi-flyer. It must be solved for realizing miniaturized, practical and engineered initiation system of laser-driven flyer to select proper optic fiber, enhance fiber damage resistance, design proper fiber transmission channel, optimize laser parameters, improve structure of multi-flyer, and determine the thickness of each layer.