Ionosphere is a typical dispersive medium, which may cause frequency depended delay to navigation signal. In the practical applications, the ionosphere delay between signals at different frequencies is considered only, while the effect of ionosphere dispersion on the receiving for a single navigation signal is usually ignored. A module was established to analyze the effect of ionosphere dispersion. Base on this module, the effect of ionosphere dispersion on some typical wide-band navigation signals was analyzed, such as BPSK(10), BOC(14,2), AltBOC(15,10) signals. The analysis results indicate that the effect on BPSK(10) signal can be ignored, but some correlation loss and carrier phase tracking error will be introduced into the track of high order BOC signals, such as BOC(14,2) signal and AltBOC(15,10) signal, and the correlation loss and carrier phase tacking error of AltBOC(15,10) can be 1.4dB and 0.185 cycles separately.