The utility model discloses an electric actuating mechanism circuit board testboard. The electric actuating mechanism circuit board testboard comprises a workbench and an operation panel. The workbench is provided with a speed regulation motor, the speed regulation motor is connected with a valve position testing shaft through a gear drive system, the upper portion of the workbench is provided with a mounting bench used for mounting a valve position plate, the workbench is further provided with a mounting case used for mounting a control panel, the workbench is provided with a power supply strip arranging seat used for arranging a power supply strip, and the workbench is provided with a power supply and an asynchronous motor. The operation panel is provided with a valve position display screen, a rotational speed control switch, a start and stop switch and a rotational speed display screen, and a power supply on-control button, a power supply off-control button and a voltmeter which are used for controlling a power supply. The electric actuating mechanism circuit board testboard can be used for simulating various of functional tests. By adopting the electric actuating mechanism circuit board testboard, a valve position plate, a control penal and a power supply strip do not need to be mounted on an electric actuating mechanism to be tested, test data can be displayed on the operation penal, so the test time is saved, and the test efficiency can be raised.