The optically regenerative Q-switch method, by which the laser output can be stabilized, is simple and easy to operate. But the disadvantages of laser prepulses inevitable and the successive pulses easily produced severely limit the applications of this method to laser amplifiers and laser range-finders. To overcome these shortcomings we have designed a new method using axial superradiant signal to trigger the Q-switoh. The principle is as follows: The superradiant signal intensities near the axial correspond to certain population during the laser process of the optical pumping. So we can oontrol the population whioh can trigger the Q-switch by controlling the superradiant convert electrioal level in the superradiant deteotor and then the laser output can be stabilized. ISfear the laser threshold the variation of peak heights of laser pulses controlled by ■superradiant signal triggered Q-switch is reduce^ to only 1/4 of original value when we change the voltage of xenon-flash lamp near the laser threshold. The laser output reproducibility may also be improved by this method.