“勿勿”是魏晋人书札中的习见语、当代许多学者将其按现代书札寒暄语释为“匆匆”．认为“勿勿”为古代书札磨损所致．本文通过大量文献考证．得出“勿勿”’即“忽忽”（意同“匆匆”）是魏晋习见语的结论．今人以今律古则难以解释大量魏晋书札及其他古籍中的该词例。 “Do not be” is a common language in the books and journals of Wei and Jin dynasties. Many contemporary scholars interpret it as “haste” according to the modern Zabian language. Think “Do not” worn by the ancient Shusa. This article through a large number of literature research. Obtained “Do not” or “suddenly” (meaning “hurry”) is the conclusion of the Wei and Jin Xi language. Today’s ancient law is difficult to explain a large number of Wei and Jin Shu Zha and other ancient books in the word.