A design method for using comb like dispersion profiled fiber (CDPF) to achieve pulse compressing is given, and corresponding numerical model is also presented. Based on this model, the effect of nonlinear phase shift on pulse width and waveform from CDPF compressor was studied under the condition of different pulse peak power. The numerical results reveal that the incident pulse peak power and nonlinear phase shift should be satisfy certain conditions, to get the suited CDPF compressor for using in the ultrahigh speed optical time division multiplexing (OTDM) system.