An experiment of double-stage dye laser amp lifying system pumped by high average power and high repetition rate Nd∶YAG lasers are presented. The device constitutes two frequency doubled Nd∶YAG green lasers, DG535 pulse generator, dye laser oscillator and two stages dye amp lifiers. In the experiment, 16. 8% of pump power extraction efficiency with last stage dye amp lifier, 10. 6% with total dye laser system and 9. 2W ofmaximun dye laser output power are obtained.