The femtosecond pulses produced by Ti∶sapphire mode-locked laser were applied as the pump light,to generate the supercontinuum light source in the polarization-maintaining photonic crystal fiber with the average core size of 1.8 μm due to its high nonlinear properties.The multi-colors laser light source in the visible region with the central wavelengths of 431 nm, 497 nm, 520 nm, 575 nm, respectively, was achieved to be mW level with the adjusted coupling between the pump source and the photonic crystal fiber. And the output optical pulses were measured to be good stability with the same repetition rate of 250 kHz to the pump pulses.