This paper analyzes the causes of the rotor-type parts vibration, briefly describes the present situation of special balancing machine. On this basis, according to the current status of the domestic general high speed balancing machines, and the balancing challenges of high-speed high-power compact Motorized Spindle rotor, analyzes the balancing principle, and proposes a balancing machines design solution, to ensure high accuracy and reduce loading time, and then complete the dynamic balancing machine mechanical structure design.