The in-plane mode piezoelectric vibrator is an important branch of piezoelectric actuators, and the miniature in-plane mode piezoelectric vibrator is rarely studied. In order to broaden the application of in-plane bending piezoelectric vibrator, a short-cylinder piezoelectric vibrator is proposed for flexible driving. The structure size, working mode and natural frequency of piezoelectric vibrator are determined by ANSYS. The outer diameter of vibrator is 30 mm, the height is 12 mm, and 36 teeth structures with height of 2 mm are evenly distributed on the outer ring, which is used to amplify the amplitude. The tested results show that the bending working modes of the same frequency orthogonal third-order plane. The experimental results show that the structure can well excite the third-order in-plane bending working modes with two same frequencies orthogonal. The vibrator has the same frequency orthogonality and the resonance frequency is 27 140 Hz in the working mode of B03, which is consistent with the simulation results. The feasibility of the piezoelectric vibrator for flexible driving is verified by experiments.