Frequency-doubled light from a repetitive pulse and mode-locked YAG laser of thermally stable cavity was used to synchronously pump a R-6G- dye laser. Experimentai results obtained are as follows: average power 14 mW, peak power of single pulse over 5 MW, single pulse width 28 ps, repetition rate of pulse train 20 pps, tunable range from 555. 0 nm to 586. 5 nm, spectral linewidth 0.1 nm, conversion efficiency 11%; when the linewidth is 0.04nm, the conversion efficiency is 8%.