A new multiwavelength chirped fiber Bragg grating (MCFBG), with ITU T standard wavelength and space of neighbored wavelength was fabricated. The one MCFBG can compensate multichannels′ dispersion of 100 km fiber span at the same time. Experiment of 4×10 Gb/s 412 km WDM dispersion compensation without bit error rate have been demonstrated. The compensative result with MCFBG is better than that with dispersion compensation fiber module.