This paper reported high power high stabilization 85 W all-solid-state green laser operation, which was pumped by 80×20 W high power laser arrays. The theoretical analysis of the influence of thermal effect and phase mismatching about frequency-doubling crystal on output was presented. The calorific power distribution is numerically simulated and the values of frequency-doubling crystal phase mismatching varying with the change of temperature were given. In experiment, double acousto-optic Q-switching were employed inside single Nd∶YAG rod, high efficiency flat-concave intracavity-frequency-doubled resonance structure. A maximum green power of 85 W was generated at 20.4 kHz repetition rate and 230 ns pulse width when pumped current of laser diodes was 17.3 A with compensating phase mismatch by angle departuring and strong cooling big KTP crystal, leading to ±1.03% instability and 9.7% of optical-optical conversion efficiency.