A picosecond fiber laser was applied for high power supercontinuum generation (SCG) in photonic crystal fiber (PCF), the key technical issues of fabricating high power all fiber supercontinuum sources were considered and the advantages and disadvantages of picosecond fiber lasers in several configurations for SCG in PCF were analyzed. By using a repetition rate increasing system, a high power picosecond fiber laser suitable for SCG was constructed. By enlarging the core of the PCF at the input end through post-processing method, low splicing loss was realized between the double cladding fiber and the PCF. 35.6 W supercontinuum output is realized with spectrum covering the wavelength range from 650 nm to 1700 nm.