带电粒子在磁场中的运动是物理新教材中的重点和难点之一,也是历年高考的热点之一.它涉及力学、运动学、电磁学等多方面的知识,是学科内综合的典型.本期刊登的这3篇文章,从3个不同的角度对带电粒子在磁场中的运动问题作了一些探讨,希望能给高三学生的复习带来帮助. The movement of charged particles in the magnetic field is one of the key and difficult points in the new physical textbooks, and it is also one of the hot topics of the college entrance examination. It involves various aspects such as mechanics, kinematics, and electromagnetism. It is a typical example within the discipline. The three articles published in this issue have explored the motion of charged particles in a magnetic field from three different perspectives, hoping to help review the third-year students.