The article puts forward the synchronous pump A-O Q-switched all solid-state pulse laser, analyzes the basic theory of it, designs and realizes this new type of pulse laser. The laser overcomes the faults of the parasitical laser pulse which exists now small all solid-state pulse laser and low power of laser pulse peak value. We have got the continuous output laser pulse without parasitical pulse, which is with the repeat frequency 4.5 kHz, the peak power value 6 kW, and the width of pulse 18 ns, by using 2 W LD pump. The laser, with higher peak power value and better laser pulse, can meet the demand of laser rangefinder and laser radar. The article describes in detail the experiment scheme, experiment device and experiment results.