The invention discloses vibration excitation equipment for the entire acoustic vibration of a violin and a system and method for measuring a frequency spectrum. The vibration excitation equipment comprises a voice frequency signal generator, a power amplifier, a giant magnetostrictive transducer, a string pulling arm and a violin case attaching clamp. According to the measuring method, the method that strings are pulled by the giant magnetostrictive transducer to excite the vibration of violin bridges is introduced, firstly, the giant magnetostrictive transducer and the string pulling arm respectively pull the G string, the D string, the A string and the E string and excite the vibration of a violin case under the control of voice frequency signals, and then a spectrogram is generated by means of acoustic measurement and a computer spectral analysis technique. The vibration excitation equipment for the entire acoustic vibration of the violin and the system and method for measuring the frequency spectrum simulate the motion states, such as the torsional pendulum vibration in the horizontal direction and the alternate vibration in the perpendicular direction, of the violin when the violin is played and the violin bridges are pulled under the vibration of the violin strings, the measuring environment is similar to the actual playing state of the violin, and the accuracy and scientificity of the frequency spectrum measurement result are improved. Meanwhile, feasible technological approaches are offered to tone adjustment, acoustical quality objective evaluation and the like in the manufacturing processes of the violin.