因摩擦力改变引起的多过程问题是高中物理教学的难点,也是高考的热点。文中从一道高考模拟试题出发,分析了学生解题错误的根源,提出了解决这类问题的具体方法:从力和运动的角度分析问题,把握两个关键点:“速度相等”和“最大静摩擦力”来突破问题。最后以2011年广东高考题为例再作说明。 The multi-process problem caused by the change of friction is the difficult point of high school physics teaching and also the hot spot of college entrance examination. Based on a college entrance examination simulation test, the paper analyzes the root causes of the students’ problem solving errors and puts forward specific methods to solve such problems: to analyze the problems from the point of view of force and movement and to grasp two key points: “equal speed” and “ ”Maximum static friction " to break the problem. Finally, the 2011 Guangdong college entrance examination questions as an example for further explanation.