Based on the survey of 250 staffs, this study explored the relationship between self-oriented perfect-ionism and procrastination. It is found that self-oriented perfectionism negatively correlates with procrastination and conscientiousness of Big-five plays a moderating role: For people low in conscientiousness, self-oriented perfectionism would significantly decrease the procrastination, while for people high in conscientiousness, self-oriented perfectionism has no effect on procrastination. The results are of great reference value for further under-standing of procrastination, and its influence factors.