The compound ultrasonic miniature motor consists of stator to excite ultrasonic vibration, rotor or runner to output moment and pre-stress mechanism to pressurize the rotor or runner. The stator consists of mainly composite element comprising square hollow metal column to excite vibration and piezoelectric ceramic chips and matching block. The piezoelectric ceramic chips are adhered to two or four sides of the square hollow metal column, has coated outer electrode for polarizing and exciting in the surface and is polarized in the thickness direction. The ultrasonic miniature motor of the present invention has the advantages of easy polarization of the piezoelectric ceramic chips, exciting electric field perpendicular to the polarization direction and high efficiency. The present invention has size as small as 0.3 mm, and may find its wide application in biology, medicine, micro machine, etc.