The invention relates to a forward and reverse trailing electro-hydraulic proportional loading device for testing an actuator, which belongs to the technical field of actuator loading control. A pumping station of the invention supplies oil to a hydraulic cylinder through a proportional overflow valve and a solenoid directional valve; one end of the non-rod chamber of the hydraulic cylinder is connected with a base through a joint bearing, and a piston rod thereof is connected with an oscillating arm through a trunnion; the other end of the oscillating arm, a torque sensor and an actuator connector are connected into a whole in sequence through a coupling; the oscillating arm and the torque sensor are respectively fixed with the base through an oscillating arm bracket and a sensor bracket, and a measuring and controlling case controls the starting and stopping of the pumping station, the overflow amount of the proportional overflow valve 4 and the oil supplying direction of the solenoid directional valve, and acquires signals of a pressure sensor and the torque sensor. The device realizes the forward and reverse linear regular moment loading within the range of minus 60 degrees toplus 60 degrees, the loading method has high reliability and good dynamic characteristic, and the device has good prospect of application and extension.