Abstract: The Heisenberg uncertainty principle is one of the foundations of quantum mechanics, although meaning of this principle is disputed in the region of physics. The teaching of this principle should help students to discard the conventional conception of orbit and establish the idea of wave-particle duality. However, the conventional conception of orbit is still used in many domestic textbooks of university physics. The students tend to be confused consequently. Therefore, tens of textbooks of university physics are investigated and different accounts about uncertainty principle are compared, and then advice of teaching on this principle is brought forward.

Key words: wave-particle duality, uncertainty principle, advice for teaching