Degenerate four-wave mixing phase conjugation in Mn doped KNSBN crystal is obtained by using 1mW He-Ne laser beams. The reflectivities are significantly affected by polarized arrangements and by angles of incident beams. When the angle of the probe beam is near Brewster angle the reflectivity can reach up to 60%. The life time of photorefractive grating which takes 60 s for setting up is 18 hr. The-induced degenerate four-wave mixing phase conjugation has been observed.