A scheme is proposed to form a transmitted-type electromagnetically induced grating and enhance cross-phase modulation (XPM) and self-phase modulation (SPM) of a probe pulse field using a standing-wave field in a four-level system. The shorter the probe pulse is, the higher intensities of standing-wave field and probe pulse field required to achieve the same phase shifts of XPM and SPM nonlinearities are, comparing with a long pulse or continuous wave (CW). Because of standing-wave grating generated by counter propagating resonant coupling fields, the resonant probe field can be transparent in the coherence medium with a giant nonlinear refractive index when an additional off-resonant coupling field is added. Group velocity of the probe pulse can be controllable by both XPM and SPM nonlinearities.