A double frequency Nd:YAG green laser and copper vapor laser(CVL) were used to pump doublestage dye laser amplifiers. The average output power of 9.0 watts and high repetition rate dye laser were obtained in the experiment. The pump power extraction efficiency with the second stage dye amplifier was up to 26.6% and the total efficiency of the dye laser system was about 13.6%. The relationships between dye laser output power,pump power extraction efficiency and dye laser's wavelength were also given.