The invention discloses a torsional oscillation protection test device. The torsional oscillation protection test device comprises a management module, an alternating-current electric quantity output module, a torsional oscillation signal output module, a time setting module and a liquid crystal display module. The management module is used for managing a liquid crystal menu, communicating with a computer and issuing data to the alternating-current electric quantity output module and the torsional oscillation signal output module. The alternating-current electric quantity output module and the torsional oscillation signal output module are respectively used for calculating an alternating-current electric quantity signal and a torsional oscillation signal required by generator torsional oscillation protection in real time, and the operation state of a generator large shaft is simulated; the alternating-current electric quantity signal and the torsional oscillation signal are synchronously output through a synchronization signal. The liquid crystal display module is used for providing man-machine interfaces, cooperating with the management module and controlling the torsional oscillation protection test device to carry out tests. According to the invention, the principle is clear, the method is simple, the interfaces are abundant, the usage is flexible and convenient, the system testing is simplified, and the practical value is very high.