A 168 MHz high repetition all-normal-dispersion mode-locked ring fiber laser is realized experimentally. The wavelength of the fiber laser is 1040 nm and output power is about 270 mW. The output pulses are amplified by using double cladding Yb-doped fiber and the max average output power reaches 12 W. By pumping the high nonlinear photonic crystal fiber (PCF) with the amplified high repetition pulses, the supercontinuum with average power of 9.14 W and spectrum range from 600 nm to 2000 nm are obtained. The mechanism of the supercontinuum generated by amplified pulses is qualitatively explained.