The utility model relates to a generator rotor turn to turn short -circuit fault location test device, comprises a processo, the FPGA circuit, drive signal generating device, double - circuit synchronous sampling device, PCIe bus device, first excitation mode select switch, second excitation mode select switch, an impedance adjustment potentiometre, the 2nd impedance adjustment potentiometre, an outlet relay, the 2nd outlet relay, a shielded cable terminal, the 2nd shielded cable terminal and the 3rd shielded cable terminal, the treater is used for the connection control terminal, the treater is according to the different control corresponding device of the instruction of receipt, control FPGA circuit generates drive signal wave form data, and drive drive signal generating device generates drive signal, the wave form of generator rotor feedback is gathered to FPGA circuit drive double - circuit synchronous sampling device, erupt simultaneously and deliver to the treater and handle, generate final wave form, control terminal carries out the concrete position that the analysis can reach generator rotor turn to turn short -circuit fault according to the wave form of receiving, the positioning accuracy is high.