This paper reports a degenerate four-wave mixing effect in Fe-doped LiNb03 crystal at low laser power (He-Ne laser, λ=6328?). The experimetal curves about intensity of conjugate wave vs. irradiate time at different pump power is given. The phase-compensated property of the conjugate wave was examined, and the phase distortion image was corrected by means of this property. The experimental results obtained agree with the theory.