Multi DOF ultrasonic motor is the combination of more than two ultrasonic vibration modes in accordance with a certain way. In this paper，the characteristics of the vibration of the complex pattern of vertical cylindrical curved multi DOF ultrasonic motor are studied. The stator of the motor is composed of two groups of sandwich lamination oscillator. The motivation of one group of sandwich lamination piezoelectric voltage is to produce larger vertical vibration displacement; the other group of piezoelectric sandwich lamination, used to produce the two directions of the blending vibration, is composed of two longitudinal vibrations of piezoelectric patches and four bronze electrodes. Referring to the calculated method of frequency of transducer, the frequency equation of motor longitudinal bending by the wave equation of the vertical bending vibration is derived. Considering the interactions of vertical bending vibration of the stator with multi DOF, the frequency equation of motor longitudinal bending is modified. Comparing the theoretical results, the numerical simulation results and experimental results, the correctness of theoretical calculations is proved.