Portable DTU simulation test device and method

The invention relates to the field of equipment testing, in particular to a portable DTU simulation testing device and method. The signal interaction panel is integrated with an analog signal interface and is used for realizing interaction with voltage and current analog signals of DTU equipment and controlling receiving and sending of the signals; the ring main unit action simulation module is connected with the signal interaction panel and is used for accurately simulating an opening position, a closing position and a fault signal of the ring main unit; the operation display simulation panel is connected with the control circuit and is used for executing switch simulation actions in a manual or automatic operation mode and providing instant operation feedback; and the control circuit is connected with the signal interaction panel, the ring main unit action simulation module and the operation display simulation panel, and the control circuit is used for uniformly controlling generation of simulation signals,