A high repetition rate acousto-optic Q-switching of high power double Nd:YVO_4 all-solid-state TEM_(00) laser was reported.To reduce the thermal effect and achieve higher power output,there are two Nd:YVO_4 laser crystal with low nd-dopped concentration in the cavity,and the crystal are pumped by two high power fiber coupled laser diode with TEC cooling,In CW operation,the laser output power was 24 W with TEM_(00) mode at 50 W of diode pump.In Q-switching operation,the maximum average power of 22.9 W was obtained at the maximum repetition 50 kHz,the pulse duration of this repetition was 38 ns,and the corresponding optical-optical conversion efficiency was about 45.8 %.The highest single pulse energy of 1.55 mJ with peak power of 103 kW was generated at the repetition rate of 10 kHz,and the pulse duration of this repetition was 15 ns.