The dependence of the output of self pumped phase conjugation (SPPC) on the different cutting methods of Ce:KNSBN crystal is analysed. The conjugate reflectivity up to 57.16% in a Ce:KNSBN crystal with a 18° angle between crystal axis and crystal surface is reported at a 514.5 nm Ar + laser. The phase conjugate reflectivity is proved connecting with the incident angle and incident position by experiments. Increasing the incident intensity, the response time of SPPC is demonstrated decreasing.