Abstract: The double wavelenghs short pulse laser was developed with the high mode volume and variable reflectivity mirror(VRM). The thermal lens and the thermal birefringence produced by diode-lasers pumped rod laser medium was compensated, which presented a short-pulse energy of 140 mJ and 1 064 nm laser output with a pulse width of 17.76 ns at a repetition rate of 500 Hz. The beam quality value was M21.6, and the energy instability(RMS) value of 20 minutes was less than 0.3%. The result of resonator was corresponded with Master Oscillator Power-Amplifier(MOPA) technology, but it was close and neat. The maximum laser energy of 96 mJ at 532 nm was demonstrated by extra-cavity second-harmonic generation(SHG) with type-Ⅱ angle phase-matched GTR-KTP crystal, the KTP crystals with resistance to grey trace effect was grown by hydrothermal method. The maximum efficiency of SHG was 68.6%, and the beam quality value was M22.1. The 1 064 nm and 532 nm laser were output at same axis with energy regulation.