In order to obtain a kind of spinning prism with high spinning speed, continuous adjustability and robust stability, the driving system of a high-speed motor for spinning prism Q-switch was designed. Using an AVR chip and a grid electrode driving integrating module, the high-speed motor controlled by three-phase frequency conversion was designed. The results show that the driving system of the motor can work stably when the rotation speed is less than 60.8 kr/min, which can realize “fast” shutoff of the Q-switch. The designed Q-switch is applied in Diode Pumped Solid State Laser(DPSSL), and the 14 kHz turning-off-ability Q-switch in the high repetition rate and high-power DPSSL is realized in a experiment with the rotation speed of 43 kr/min, which is the best result in the spinning mirror Q-switch by now.