The driving mode of Peak & Hold current shape is adopted in common rail diesel electronic control injector driving circuit. The requirements of current change are different in different stages. In order to meet the changes in the injection process, the state responses characteristics of the circuits to optimize the circuit and improve the response speed of electronic valve were analyzed theoretically. The driving circuit was designed based on the bootstrap circuit. The results showed that the fluctuations amplitude of the current in the hold stage reduced by 50% under the same driving parameters in the optimized circuit, and the response time was only 20μs in the injector closing process, which realized the purpose of precise control of the injection quantity and injection timing.