A new dispersion compensation method for high-speed terrestrial cascaded Erbium-Doped Fiber Amplifier wavelength division multiplexed (WDM) optical transmission systems is proposed in this paper. By means of specially designed dispersion-shifted fiber(SDDSF) with zero dispersion wavelength around 1. 6μm and dispersion slope S
0
=0. 05ps/km/nm
-2~-4ps/km/nm dispersion is generated at 1550nm to avoid severe four-wave mixing in WDM systems using ITU-T G. 653 DSF. The positive dispersion of ITU-T G. 652 standard single-mode fiber is utilized to compensate for the negative dispersion of SDDSF over 1530~1570nm (EDFA bandwidth ). With this method
dispersion induced eye opening penalty could still be less than 1dB after 1000km fiber transmission in systems with bit-rate higher than 10Gb/s per channel.