The invention provides an experimental measurement method of dynamic parameters of a solid rotor large phase modifier. During an experiment, the solid rotor large phase modifier is in a static state,and an exciting winding of the solid rotor large phase modifier is in a short-circuit state; when d-axis parameters are measured, the axis of the exciting winding is perpendicular to that of a statorc-phase winding, when q-axis parameters are measured, the axis of the exciting winding is aligned with that of the stator c-phase winding, related current and voltage waveform data which is acquired during measurement of the d-axis parameters and related current and voltage waveform data which is acquired during measurement of the q-axis parameters is recorded, equivalent circuits of d-axis and q-axis of the solid rotor large phase modifier are determined, according to voltage balance equations of the equivalent circuits, by adopting an analytical calculation method, expressions of the statorwinding a-phase circuit and the exciting winding current are obtained, and time domain fitting is conducted on the recorded waveform data to calculate and obtain values of the dynamic parameters of the d-axis and q-axis of the solid rotor large phase modifier. By adopting the experimental measurement method, related problems caused by three-phase sudden short-circuit tests are solved, and the dynamic parameters of the solid rotor large phase modifier are accurately measured.