传送带问题,是动力学问题中一种常见的题型,也是历年来考查的热点,学生对这类问题往往不能很好的处理.笔者就教学中遇到的两道例题进行分析和拓展. Conveyor belt problem is a common question in the dynamics problem, and it is also a hot spot for examinations over the years. Students often do not deal with this kind of problem very well. The author analyzes and expands two examples of problems encountered in teaching.