Legal analysis: it is not forbidden to be a teacher if you are in debt for a long time. Only those who have been deprived of political rights or have received criminal punishment of fixed-term imprisonment or above for intentional crimes are not qualified as teachers.

Legal basis: Article 14 of the Teacher Law of People's Republic of China (PRC) is deprived of political rights due to intentional crimes or is subject to criminal punishment of fixed-term imprisonment or above, and cannot obtain teacher qualifications; Those who have obtained teacher qualifications shall lose their teacher qualifications.