As the core components of electrical initiators， transducers are essential for the safety and reliability of electrical initiators. The development trends of miniaturization of the structure of electrical initiators， informatization the transducing process and integration of the firing sequence have put forward higher requirements for transducers. How to realize reliable ignition under low energy stimulation and enhance the ignition output capacity has become one of the major issues for the current research of transducers. To this end， this review summarized the latest research progress on the low-energy firing and output efficiency enhancement of electrical initiator transducers in recent years from the perspectives of the preferential selection of transducer substrate and resistive materials， the optimal design of firing structure， the efficiency enhancement of self-contained energetic integration and energetic film composite. On this basis， the focuses of future research on the efficiency enhancement of transducer are discussed： establishing a gene pool of transducer material parameters， improving the efficiency of transducer firing structure optimization design by means of machine learning algorithms， conducting basic research on novel transducer systems such as wide-bandgap semiconductor materials， and exploring the integration of novel energetic films such as energetic Metal-Organic Frameworks （MOFs） and chalcogenide on transducers.