Abstract: To research the transmission characteristic of low power signal optical pulse outside the stop band of uniform periodic structure,the theory analysis was run by the numerical result of the nonlinear Schrdinger equation.The relation curve of pulse width and peak power against the transmission,and the slow light delay of pulse with difference frequency deturning were shown.Results show:pulse waveform will experience a very remarkably evolution,and the peak power of output pulse will hold comparative to that of the incident pulse when the incident pulse has appropriate initial chirp parameter.The theory results obtained will produce importance reference value in experiment.