Abstract: To acquire high-power narrow-width 532 nm green laser，we used the acousto-optic driving Q-switched synchronization technology with high repetition rate and the laser diode (LD) side-pumped Nd∶GdVO4 laser to get high-power linearly polarized 1 064 nm laser output. We achieved high-power green laser output by intra-cavity frequency doubling and KTP non-linear frequency conversion. As the input current was 30 A and the Q-switched frequency was 10 kHz, we got the 1 064 nm polarized laser output with maximum power of 30 W and narrow width of 30 ns, and the 532 nm green laser output from KTP crystal with the maximum power of 23.4 W. Conversion efficiency of 1 064 nm to 532 nm was 78%. Experiment results indicate that the acousto-optic Q-switched technology and LD side-pumped Nd∶GdVO4 laser in tandem technology can be used to obtain high repetition frequency 1064nm polarized laser, and the high-power 532 nm green laser can be output by KTP non-linear frequency conversion.