The invention discloses a 2-degree of freedom piezoelectric driver of a bent piezoelectric vibrator and a motivation method of realizing 2-degree of freedom movement by using the driver, and belongs to the technical field of the piezoelectric driving. The problem that the existing 2-degree of freedom piezoelectric driving device is complicated in structure, high in cost and small in travel is solved. The driver comprises a base, a piezoelectric vibrator and a mover; the bent piezoelectric ceramic is divided into two parts: the first set of bent piezoelectric ceramic group and the second set of bent piezoelectric group; when two sets of piezoelectric ceramic exert a voltage motivation signal, the piezoelectric vibrator can realize the bending movement of 2-degree of freedom. By changing the voltage motivation signal, the bending direction of the piezoelectric vibrator can be controlled; the friction force is used as the driving force and the piezoelectric vibrator is used as the stator so as to drive the mover to realize the 2-degree of freedom movement. The 2-degree of freedom piezoelectric driver is mainly applied to the super-precise driving, positioning, processing and like field.