Abstract: Based on the investigation and analysis of the imported hydraulic actuator of gas fuel control valve in gas turbine, and combined with considerable experience in use and design, a 100% domestically produced hydraulic actuator for gas turbine gas fuel control valve has been newly developed. The principle design of the hydraulic actuator of gas fuel control valve was emphatically introduced, and the frequency response of the hydraulic actuator was simulated and analysed by building a simulation model. After which, the reliability verification and multiple performance tests were carried out for the hydraulic actuator with an established test system. Simulation and test results indicate that, the performance of the domestically produced hydraulic actuator for gas turbine gas fuel control valve is superior to that of the imported actuator in many aspects. The successful development of hydraulic actuator sample for gas turbine gas fuel control valve has broken through the localization problem.