The invention relates to an electro-hydraulic actuator system for leveling. The system comprises a fuel tank assembly, an integrated assembly, a connecting assembly a drive and motor assembly and a hydraulic cylinder assembly; the fuel tank assembly, the integrated assembly, the drive and motor assembly are installed on the connecting assembly; the hydraulic cylinder assembly is connected with theintegrated assembly through flexible pipes; an upper end of the hydraulic cylinder assembly is fixedly connected with a lower end of a vehicle body. The electro-hydraulic actuator system for levelingcan effectively solve the problems of centralized fuel supply and realize energy saving and has good control characteristics and energy saving characteristics; the system can also improve the reliability of the missile launching vehicle and has important significance to the leveling system of the missile launching vehicle; at the same time, the electro-hydraulic actuator system integrates all components for leveling and can effectively realize miniaturization of the integrated system.