The invention provides a simulation test system and a simulation test device of train network control software. The simulation test device comprises a man-machine interaction unit, a controlled plant creating unit, a vehicle-mounted electrical connection creating unit, a simulation interface creating unit and a simulation control unit, and the simulation test system of the train network control software comprises at least one group of pull-in control unit test systems; each pull-in control unit test system comprises the simulation test device and at least one set of network control system core equipment which comprises a central control unit, the central control unit is switched into a vehicle bus and a train bus, and the simulation test device is switched into the vehicle bus; and the central control unit is electrically connected with a hard wire of the simulation test device, and the simulation test devices in two or more than two pull-in control unit test systems are connected through an Ethernet. The simulation test system and the simulation test device provided by the invention can directly service development and test of the train network control system software, and can quickly construct an experimental model, shorten development cycle, and reduce economic cost.