Abstract: Presently, the research and application of the multi-DOF USM in the world is in the investigating stage, many structure multi-DOF USM have come forth. A multi-DOF USM based on single longitudinal-bending transducer vibrator was proposed and studied. The transducer brings multi-DOF driving trajectories only with single tip. The tip drives spherical spinner. model analysis was carry out on cross orthogonal transducer, with the FEM method, the longitudinal and bending resonance frequencies are degenerated; An analytical model of the multi-DOF driving foot trajectories has been developed; analyzed the driving foot trajectories with typical driving mode by simulation; Relationship of rotary speed with voltage and torque with rotary speed around coordinate axis was measured, corresponding efficiency was figured out. The experimentation is conformity with trajectories of analysis.