This paper analyzes the relationship between evil and traditional culture by examining and explaining the connotation of six kinds of ominous behaviors: associating with evil, being angry without matter, neglecting teachers, revealing oneself at night, seeking money without reason, and never changing one's mistake. It discusses their cultural connotation as one of the reasons influencing the "varying length of life" in Family Education of King Wu, and probes into the relationship with the warning function of family education and childhood education in Tang Dynasty. The author thinks that "six ominous characters" is related to children's education and academic success or failure, pattern and ambition, habit and behavior education. And for the most easy to meet incur personal disaster, which is intended to correct, admonish and warn the children of these improper behavior as early as possible.