This paper aims at the discussion on teachers' personality.Personality education has already been regarded as a part of whole education.Thus it is very necessary for those who are teachers or who are going to be teachers to know something about teachers' personality.This paper intends to discuss teachers' personality from the following aspects: what is teachers' personality;what are the standards of a sound personality of a teacher;what the effects of teacher's personality on students are;how to develop a sound personality.