Abstract: In quantum mechanics, studying the evolution of wave packets can help students correctly establish physical images of microscopic particle motion and understand the differences between quantum physics and classical physics. However, the complex mathematical results obtained from solving the Schrödinger equation often make it difficult for students to intuitively understand the evolution laws of wave packets. This article takes the evolution of an electronic wave packet in a magnetic field as an example to introduce how to design visual numerical experiments in teaching practice, in order to visually display the evolution of this wave packet and help students establish a clear physical image of the motion of microscopic charged particle in magnetic field. During this process, various forms such as teacher guidance, student personal participation in the visualization process, classroom flipping, and centralized discussion are combined to effectively enhance students' learning participation and achieve diversified teaching goals.

Key words:  electron wave packet, cyclotron motion, visualized numerical experiment