The invention provides a direct-current electric actuating mechanism test system and a test method thereof. The direct-current electric actuating mechanism test system and the test method are integrated in software and hardware, short in test time and high in real-time performance. The direct-current electric actuating mechanism test system comprises a direct-current electric actuating mechanism and a test system, the test system comprises a direct-current positive and negative rotation control module, a voltage measurement module, a current measurement module, a direct-current input module, a field suppression module, a load terminal strip, a signal terminal strip, an on-site keystroke and a main controller; the direct-current electric actuating mechanism is connected with the test system through the load terminal strip and the signal terminal strip, the signal terminal strip and the on-site keystroke are connected with the main controller, and the main controller is connected with the direct-current positive and negative rotation control module, an indicating lamp and a power supply. Software and hardware integration is realized, detection speed is increased, and the direct-current electric actuating mechanism test system and the test method are simple, reliable and practical.