The invention discloses a modular distribution network dynamic simulation and terminal test integration system. Under the condition that a power system similarity criterion is met, a 400V low voltage device is used to simulate a 10kV distribution network actual device according to the principle of capacity equal ratio reducing. A series of modular distribution network device simulators are designed. According to a studied actual 10kV distribution line, a corresponding distribution network simulation test system is combined by simulating a configuration screen. By simulating normal operation, power outage and transmission operations, power supply fluctuations, grounding or short circuit faults of a distribution network in different grounding modes, transient and steady operation characteristics of the distribution network are recorded and studied. In addition, the system can simulate an automation movement and a processing process of a feeder, and tests the functions and the performances of a distribution automation switch controller.