The experimental study on visible light enhanced supercontinuum generation pumped by Yb-doped large mode area photonic crystal fiber laser amplifier is reported. The high nonlinear photonic crystal fiber has suitable dispersion making the red shifted soliton and blue shifted dispersion wave have a same group velocity. They move together in the fiber and interact with each other through four wave mixing. A 3.95 W high power supercontinuum was obtained with 1.2 W in the visible region. The optimization of fiber structures was numerically designed. As a result, the fiber with smaller core size or larger air filling fraction can shift the wavelength to blue.