A high repetition rate acousto－optic Q－switching of high power two Nd∶YVO4 all－solid－state TEM00 laser is reported, To reduce thermal effect and achieve higher power output, there are two Nd∶YVO4 laser crystals with lowdopped concentration in the cavity, and the crystals are pumped by two high power fiber coup led laser diodeswith TEC cooling, In Q－switching operation, the maximum average power of 18. 21W is obtained at the maximum repetition 100kHz and 50W of diode pump, the pulse duration of this repetition is 62ns, and the corresponding optical－optical conversion efficiency is about 36. 4%. The highest single pulse energy of 1. 3mJ with peak power of 80kW is generated at the repetition rate of 10kHz, and the pulse duration of this repetition is 16. 4ns.