Using linear stability analysis and the standard split-step Fourier method, the influence of noise on the propagation character of femtosecond pulse and the generation of supercontinuum spectrum were studied in photonic crystal fibers with two zero dispersion wavelengths according to nonlinear Schrdinger equation.The results show that the initial spectral broadening is mainly due to SPM whatever there has noise or not,but noise increases the speed of the breakup of pulse. Comparing with no noise, dispersive waves appear in a shorter propagation distance. Higher-order soliton splits into many fundamental solitons in the later propagation, and the noise weakens the walk-off effect of soliton,and suppresses the soliton self-frequency shift. So the moving of the pulse energy of the anomalous dispersion regime into the longer wavelength becomes weakly.