The acousto optic modulator driver is an important part of the pulsed fiber laser, how to enhance and perfect the performance of the driving circuit has become an important factor that decides the output laser quality. A scheme of acousto optic Q switched driver with low power consumption and stable and adjustable output power has been proposed in this paper. The RF power output can be controlled by 2ASK modulation, and then the time and repetition frequency of acousto optic Q switch can be controlled. The device has excellent performance of output power of 2 W, repetition frequency of 20~200 kHz and acousto optic Q switch response time of less than 10 ns.